--- product_id: 1444424 title: "ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty]" brand: "rockstone power" price: "KD 77.64" currency: KWD in_stock: true reviews_count: 13 category: "Rockstone Power" url: https://www.desertcart.com.kw/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step store_origin: KW region: Kuwait --- # 3000W heavy-duty power 3-mode simultaneous output Full circuit breaker protection ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] **Brand:** rockstone power **Price:** KD 77.64 **Availability:** ✅ In Stock ## Summary > 🌍 Power your global lifestyle with confidence and style! ## Quick Answers - **What is this?** ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] by rockstone power - **How much does it cost?** KD 77.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step) ## Best For - rockstone power enthusiasts ## Why This Product - Trusted rockstone power brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Certified Reliability:** CE certified with a 3-year warranty—trusted by Tesla and the U.S. Military since 2001. - • **Power Through Borders:** Seamlessly step up/down voltage between 110-240V for global compatibility. - • **Built to Last & Protect:** Robust metal casing with full fuse and overcurrent protection ensures safety and durability. - • **Travel-Ready Convenience:** Includes American to European grounded Schuko adapter and spare fuses for hassle-free international use. - • **Triple Output Flexibility:** Simultaneous 110V USA socket, 220V universal socket, and 5V USB port keep all devices charged. ## Overview The ROCKSTONE POWER 3000 Watt Voltage Converter Transformer is a heavy-duty, CE-certified step up/down power converter designed for professional and home use worldwide. Featuring patented simultaneous 3-mode output (110V USA, 220V universal, and 5V USB), full circuit breaker protection, and a rugged metal casing, it supports appliances up to 2000W safely. Trusted by Tesla and the U.S. Military, it comes with a 3-year warranty and essential travel accessories, making it the ultimate power solution for millennial professionals who demand reliability and versatility across borders. ## Description ROCKSTONE POWER? takes pride in being an industry leader in Quality, Technology and Innovation, our factory is the global leader and one of the largest manufacturers in the industry. Product Features 3000 Watts Heavy Duty Step Up/Down Voltage Transformer Converter. Step Up Voltage from 110-120 Volts to 220-240 Volts. Or Step Down Voltage from 220-240 Volts to 110-120 Volts. Patented Simultaneous 3-Mode Output: 5V USB Port / 120V USA Output Socket / 220V Universal Output Socket. Metal Casing. ON/OFF Switch with LED indicator light. Hardwired heavy-duty insulated power cord with USA Grounded 3-Prong Plug. CE Certified. Full Range Fuse Protection. Full Range Over Current Protection. Purchase Guide ROCKSTONE POWER? Heavy Duty Step Up/Down Transformers aka Voltage Converters, Voltage Transformers, Power Converters, Step Up Converters, Step Down Converters, Dual Voltage Transformers, are meant for worldwide use for all electronics, heavy duty machines, or household & industrial applications. For safety reasons, it?s recommended to use a Voltage Converter / Transformer that's max watts is at least 50% higher than your appliance. For example, if your appliance is rated at 1000 watts, you need to buy a Transformer with a max power of at least 1500 watts or greater. Some appliances, such as heating appliances, power tools, motors, laser printers and TVs, require 2-4 times more watts at start up than the printed rated wattage. What's in the Box - ROCKSTONE POWER? 3000 Watt Heavy Duty Step Up/Down Voltage Transformer Converter - American to European Grounded Schuko Wall Outlet Plug Adapter - 2 PCS Spare Fuses - Instruction Manual Warranty Manufacturer 3-year limited warranty. Please contact us via email if you have any questions. Review: Functions well under constant load - Ordered this 500 Watt transformer to use an appliance from Korea in the U.S.A. Per the manufacturer, I computed the amount of wattage needed for the appliance and then doubled it. So for example, I computed that my appliance required 210 watts, so I doubled to 420 and rounded up. The appliance I have (from Korea) didn't specify the wattage using "Watt" or "W", but instead said "VA". I believe this is the same or equivalent, but you should check with a qualified electrician if this is the case with your appliance. If your unit shows just Amp or Voltage, you can multiply the two to arrive at Wattage. Again, check with someone who is qualified before using the appliance or ordering a unit so you can ensure you get the correct wattage. My calculations worked well and the appliance has functioned without problems under constant load the entire time without issues at the selected wattage. My understanding is that you'll want to double the wattage due to changes in the flow of electricity and the appliance's peak demands that could exceed the normal wattage used or identified on the back of the appliance. Be careful for laser printers or microwaves (and other high wattage appliances), I believe that can have peak watt use of much greater than their rated wattage. I believe the rule of thumb is to multiply by 3 instead of 2 to arrive at the wattage of transformer you will need. If you live in a country that has inconsistent power delivery, you may consider purchasing a separate unit that regulates the voltage. Some transformers have this built in, but this one does not. If you will be using this transformer in the U.S.A. on a modern electrical circuit, you probably do not need a regulator. I did not purchase one and have had no trouble in the month of so that I've used the unit. The transformer does get warm to the touch, but does not get hot. I expect to unplug and turn off this transformer during vacations and while away from the home for a long period of time, but I believe that this should function well under constant load indefinitely. When you plug in, make sure you select the correct voltage on the back as the removable plug should represent the SOURCE voltage of the electricity that you will be plugging the transformer INTO. In my case, I was using a 220V appliance in the U.S.A. (110V) so I selected 110V on the back and plugged the appliance into the 220V plug on the front. For some reason, I found this a bit confusing so make sure you read the instructions included with the unit. This transformer comes with a quality plug converted for U.S. style plugs (110V) to the European/Asian style (220V) which is useful if you travel internationally and have a dual 110/220V appliance (like cell phones, laptops, etc.). It may come in helpful if you need to convert plugs for the appliance you'll be using with the transformer. In general, the unit feels like it's well made and will be able to withstand a long period of consistent use. The transformer I received was cosmetically damaged during shipment (one corner bent and a few scratches). However I'm hiding this transformer behind some kitchen items so it's not a beauty contest. The unit held up well to shipment and I didn't think the scratches and bent corner warranted a return. As far as the value of the unit is concerned, I'm very pleased with the purchase. This unit appears to be quality and will last quite a while. It was less expensive than similar units and was available for delivery with desertcart Prime. The unit includes a 3-year warranty. With this transformer being used under a constant load 24/7 almost every day, I'm comfortable that all the quality issues with the unit should come out in the first 3 years. Overall: good value, quality unit, and fast free delivery with desertcart Prime. Recommended! Review: Excellent converter — works perfectly with our European coffee machine! - This converter has been a lifesaver for us. We brought our coffee machine from Europe to the U.S. a few years ago, and thanks to this transformer, we’ve been able to use it every day without any issues. The quality has been great so far, and it hasn’t let us down at all. We’re still enjoying our machine just like back home. Highly recommend! ## Features - 3000 Watts Heavy Duty Step Up Step Down Voltage Transformer Power Converter. Used in 110 Volts and 220V Countries. Step Up Voltage from 110-120 Volts to 220-240 Volts. Step Down Voltage from 220-240 Volts to 110-120 Volts. - Patented Simultaneous 3-Mode Output: 110V USA Output Socket / 220V Universal Output Socket / 5V USB Port. CE Certified. 3-Year Manufacturer's Limited Warranty. Metal Casing. Full Range Fuse Protection. Full Range Over Current Protection. - RockStone Power proudly supports the United States Military since 2001, and have became a proud supplier for Tesla Inc. since 2018. Shipping is available to all Overseas Military APO/FPO/DPO addresses. - For safety reasons, it's recommended to use a Voltage Converter/Transformer that's max watts is at least 50% higher than your appliance. For example; 3,000 transformer can be only be used with an appliance that uses up to 2,000 Watts that is to prevent damage from the transformer itself and the appliance being used. - Package Contents: Rockstone Power 3000 Watt Heavy Duty Voltage Transformer Converter, Hardwired Heavy Duty Insulated Power Cord with USA Grounded 3-Prong Plug, American to European Grounded Schuko Wall Outlet Plug Adapter, 2 PCS Spare Fuses, and Instruction Manual. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CLYMMCC | | Best Sellers Rank | #56,707 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #213 in Power Converters | | Brand | ROCKSTONE POWER | | Brand Name | ROCKSTONE POWER | | Customer Reviews | 4.2 out of 5 stars 3,402 Reviews | | Global Trade Identification Number | 00617529014618 | | Included Components | Power Converter;American to European Grounded Schuko Wall Outlet Plug Adapter;2 PCS Spare Fuses;Instruction Manual | | Item Weight | 26 Pounds | | Manufacturer | E Depot Express | | Minimum Frequency | 50 Hz | | Model | 3000 Watt | | Mounting Type | Surface Mount | | Part Number | 3000 Watt | | Power Source | Corded Electric | | Specification Met | CE | | UPC | 617529014618 | | Unit Count | 1.0 Count | | Warranty Description | 3 year manufacturer | ## Product Details - **Brand:** ROCKSTONE POWER - **Item Weight:** 26 Pounds - **Mounting Type:** Surface Mount - **Power Source:** Corded Electric - **Specification Met:** CE ## Images ![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 1](https://m.media-amazon.com/images/I/71naoKv9TdL.jpg) ![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 2](https://m.media-amazon.com/images/I/71OEniQJ6cL.jpg) ![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 3](https://m.media-amazon.com/images/I/71fgs0+ZzIL.jpg) ![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 4](https://m.media-amazon.com/images/I/614V6x5NRQL.jpg) ![ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - Image 5](https://m.media-amazon.com/images/I/710FsqUP-+L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Functions well under constant load *by C***S on November 29, 2014* Ordered this 500 Watt transformer to use an appliance from Korea in the U.S.A. Per the manufacturer, I computed the amount of wattage needed for the appliance and then doubled it. So for example, I computed that my appliance required 210 watts, so I doubled to 420 and rounded up. The appliance I have (from Korea) didn't specify the wattage using "Watt" or "W", but instead said "VA". I believe this is the same or equivalent, but you should check with a qualified electrician if this is the case with your appliance. If your unit shows just Amp or Voltage, you can multiply the two to arrive at Wattage. Again, check with someone who is qualified before using the appliance or ordering a unit so you can ensure you get the correct wattage. My calculations worked well and the appliance has functioned without problems under constant load the entire time without issues at the selected wattage. My understanding is that you'll want to double the wattage due to changes in the flow of electricity and the appliance's peak demands that could exceed the normal wattage used or identified on the back of the appliance. Be careful for laser printers or microwaves (and other high wattage appliances), I believe that can have peak watt use of much greater than their rated wattage. I believe the rule of thumb is to multiply by 3 instead of 2 to arrive at the wattage of transformer you will need. If you live in a country that has inconsistent power delivery, you may consider purchasing a separate unit that regulates the voltage. Some transformers have this built in, but this one does not. If you will be using this transformer in the U.S.A. on a modern electrical circuit, you probably do not need a regulator. I did not purchase one and have had no trouble in the month of so that I've used the unit. The transformer does get warm to the touch, but does not get hot. I expect to unplug and turn off this transformer during vacations and while away from the home for a long period of time, but I believe that this should function well under constant load indefinitely. When you plug in, make sure you select the correct voltage on the back as the removable plug should represent the SOURCE voltage of the electricity that you will be plugging the transformer INTO. In my case, I was using a 220V appliance in the U.S.A. (110V) so I selected 110V on the back and plugged the appliance into the 220V plug on the front. For some reason, I found this a bit confusing so make sure you read the instructions included with the unit. This transformer comes with a quality plug converted for U.S. style plugs (110V) to the European/Asian style (220V) which is useful if you travel internationally and have a dual 110/220V appliance (like cell phones, laptops, etc.). It may come in helpful if you need to convert plugs for the appliance you'll be using with the transformer. In general, the unit feels like it's well made and will be able to withstand a long period of consistent use. The transformer I received was cosmetically damaged during shipment (one corner bent and a few scratches). However I'm hiding this transformer behind some kitchen items so it's not a beauty contest. The unit held up well to shipment and I didn't think the scratches and bent corner warranted a return. As far as the value of the unit is concerned, I'm very pleased with the purchase. This unit appears to be quality and will last quite a while. It was less expensive than similar units and was available for delivery with Amazon Prime. The unit includes a 3-year warranty. With this transformer being used under a constant load 24/7 almost every day, I'm comfortable that all the quality issues with the unit should come out in the first 3 years. Overall: good value, quality unit, and fast free delivery with Amazon Prime. Recommended! ### ⭐⭐⭐⭐⭐ Excellent converter — works perfectly with our European coffee machine! *by A***L on November 19, 2025* This converter has been a lifesaver for us. We brought our coffee machine from Europe to the U.S. a few years ago, and thanks to this transformer, we’ve been able to use it every day without any issues. The quality has been great so far, and it hasn’t let us down at all. We’re still enjoying our machine just like back home. Highly recommend! ### ⭐⭐⭐⭐ OMG .... most stupid incorrect directions, EVER *by L***E on December 4, 2013* I consider myself a fairly intelligent person. My intelligence is well above average. I follow directions well. No, I follow directions exceptionally well. These directions are not only the WORST directions ever written, they are completely wrong. Even though I knew nothing about transformers, while I was setting this thing up, it seemed counter-intuitive. I bought a yogurt maker back from Asia. I was so excited to have finally gotten my shipment of this item in the early afternoon, I ripped open the box and went to work straight-away. Ugh. The dumb directions were so confusingly written, it took me a frustrating few minutes to try to figure it out. I had a 220V item, I needed to convert to 110V. According to the paper, I was supposed to select the input at 220V and plug my appliance into the 110V. It didn't seem right to me, but I plugged it in and set the timer for 8 hours. 10:30 at night the beeper on the yogurt maker sounded. I had seen this appliance being used in Asia, and my stepmother who cannot cook, showed me I just pour in a little yogurt drink and fill it up with milk. I had bought greek yogurt, put in 2/3 of a cup of it and filled the rest with milk. I excitedly opened the jar, and found a lump of yogurt floating in milk. I was confused. Maybe it was because I didn't use a liquid yogurt? But it had the correct bacteria in it, what went wrong? No, it couldn't be the directions to the transformer! Why would they send out wrong directions? The typo should have cued me but instead I re-read the directions, and confirmed I did everything correctly. I Googled how to make yogurt with a yogurt maker. These crazy directions about heating up milk and cooling it came up. But wait, I SAW my stepmother pour liquids and it came out yogurt 8 hours later and there was no heating milk involved. I Googled Rockstone Transformer and descriptions of the item came up. I decided, maybe I didn't add enough starter yogurt, so I added more and started the cycle again. And perhaps this time I should try the output plug that says 220V, as we all know the definition of insanity is repeating oneself expecting a different outcome. I was convinced it was going to start a fire, and my husband asked me if I wanted to move it to the bedroom just in case it did. Yes, because I want us and my wardrobe to burn first!!! Thankfully my last Google search was " How to use a voltage converter transformer" and a Wiki article came up. Now THOSE are properly written directions. The input should have been selected to 110V, because duh we are in America and it's 110V. I Love Wiki; I slept like a baby. Woke up the next morning and voila, yogurt made and apartment not burned down. Long story short, on a low watt item, putting the input in at 220V and using the output 110V is not going to A. ruin the transformer or B. start a fire, but it will definitely not make yogurt. I would have given this 5 stars as it really is a great looking and functional item that's super reasonably priced, however for making me feel like an idiot and wasting 9 plus hours of my time, I'm going to have to deduct. Note to manufacturer, go Google wiki and write proper directions and fix the typo!!! I'm feeling a bit Kathleen Turner/Serial Mom-ish, but what can I say. I'm above average intelligent ;) ## Frequently Bought Together - ROCKSTONE POWER 3000 Watt Voltage Converter Transformer - Heavy Duty Step Up/Down AC 110V/120V/220V/240V Power Converter - Circuit Breaker Protection – DC 5V USB Port - CE Certified [3-Year Warranty] - 8 Pack Universal Adapter, UK to US Adapter, Europe to US Plug Adapter, Travel Adapters, European to USA General Adapter, American Outlet Plug Adapter (White) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step](https://www.desertcart.com.kw/products/1444424-rockstone-power-3000-watt-voltage-converter-transformer-heavy-duty-step) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-15*