















🔧 Empower Your DIY Game with Precision & Safety!
The AstroAI Digital Multimeter MT33D is a compact, battery-powered tool designed for professional-grade electrical testing. It measures AC/DC voltage, DC current, resistance, and diode functionality with high accuracy. Featuring a backlit LCD, double fuse protection, and multiple battery test modes, it ensures safe, reliable diagnostics for automotive and household electrical systems. Lightweight and easy to use, it’s the essential multi-tester for millennial managers who demand precision and efficiency in their toolkit.





| Manufacturer | AstroAI |
| Part number | MT33D |
| Item Weight | 150 g |
| Product Dimensions | 13 x 7.3 x 3.7 cm; 150 g |
| Batteries | 21 Lithium Metal batteries required. (included) |
| Item model number | AM33D |
| Size | M |
| Colour | Blue |
| Style | compact |
| Material | ABS |
| Pattern | Modern |
| Shape | Quadratic |
| Power source type | Battery Powered |
| Voltage | 9 Volts |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Measurement System | imperial |
| Display style | LCD |
| Specification met | Iec 61010 |
| Special Features | Ohm Volt Amp and Diode Test |
| Specific uses | Safely and accurately solve various electrical problems in cars and homes. It is easy and safe to use and has various functions for measuring current, voltage and resistance, as well as continuity tests and diode tests. Ideal for cars and homes |
| Included components | 1 x Multimeter, 1 x Test Leads (Pair), 1 x user manual |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Zinc Carbon |
M**O
Great item great value for money
Ideal for small electrical testing, works well and value for money
A**N
Excellent inexpensive multimeter
Great piece of kit. Even comes complete with battery. Bought it as it was about the same price as a replacement set of leads for my old multimeter - a no brainer! Seems to work fine and I feel much more confident searching for live feeds as the 'pen' tester I bought keeps giving false positives. Obviously not up to pro work but for the average DIYer I give it a thumbs up.
H**K
Simple and easy to use
Good basic multimeter, I am no expert but found this super useful and easy to use. Audio beep works well when testing. Unit is lightweight. flip out stand works well but do find I need to lay the unit on it side dependng on what I am testing.
J**S
Perfect for testing batteries after Xmas
Was exactly what I wanted for testing a mixed box of batteries and sorting out the good from the bad. Easy to use and a great price too, very happy.
R**H
Pretty in red and good value
Seems good quality. Not used it yet, but seems robust, good facilities and a nice colour
P**X
Ridiculously good value for money
Having been involved in (electronic) instrument technology in the past, I found myself becoming a bit of an equipment snob. Tektronix for oscilloscopes, Keysight/Agilent or Rhode & Schwarz for spectrum analysers, Fluke for Digital Multimeters etc. These things cost many hundreds at a minimum and many (many) tens of thousands at the top end. And then we have this AstroAI which I bought for £8.49. It does everything it is supposed to, does everything a Fluke Multimeter (which I also have but wanted something more chuck-around-able) does. I am actually quite shocked as I thought anything at this price must be some sort of junk prize from a Christmas cracker but it's not. It's a fully functioning Digital Multimeter for the price of a Big Mac and Fries. I haven't tested the full accuracy yet but it is accurate enough for the majority of tasks outside of a laboratory and certainly for working on the car or around the house it is more than sufficient. Having only had it a short time I cannot attest to the reliability but at the price, even if conks out eventually, it is not exactly going to be a financial disaster. So yes, if you need to measure the mains, a voltage across or current flowing through/to a battery, check switches, fuses, appliances, check which wires are connected to which others in your car/house etc, I can recommend this unit. It even has a backlight so you can do it in the dark!
A**S
Little but very useful multimeter
This is perfect little sized meter to monitor my car battery. The quality feels good with wires connected at both ends giving results with good functionality. Have been using in winters every other morning as per the instructions and realised that the battery is good.
O**Y
Cheap but good little multimeter to carry in your tool bag
Cheap but good little multimeter to carry in your tool bag. I great, lightweight multimeter with clear, backlit display, and you can remove/replace the test leads if required (not hardwired like a lot of the other budget meters). I was going to purchase a Fluke meter, but as I am using it for work, I would be frightened of it getting stolen. This does the job nicely for me. Only one gripe is a slight delay waiting for the reading, but for the price you can’t argue.
K**.
- FAIT LE JOB👍👍👍 - LES PILES SONT DEJA PLACEE - MESURES CORRECTES - JE PREFERE LES TOUT AUTOMATIQUE 2025
O**E
Buena herramienta Buen precio
V**U
This product was very useful for finding if our batteries where useful/dead so that I could get rid of the dead ones. I love this product and is very useful. It comes with batteries and thus doed not need charging . Only read intructions about which color to connect to which terminal. It comes with manual and warranty. If you do not understand just google it. It is very easy to use. Just turn it to DC 2V and touch the terminals with the wires and the reading shows the remaining charge in the battery. Definitely recommend.
A**O
tudo ok
M**G
Ich habe das AstroAI Digitalmultimeter für einige Heimwerkerprojekte bestellt und bin insgesamt sehr zufrieden. Das Gerät ist gut verbaut und fühlt sich dank der schützenden Gummihülle stabil und wertig an. Ein besonders wichtiges Kriterium für mich war der Signalton bei der Durchgangsprüfung, und hier hat das Gerät meine Erwartungen erfüllt. Der Ton ist laut und klar genug, sodass man nicht ständig auf das Display schauen muss, was die Arbeit ungemein erleichtert. Die Messungen sind für meine Zwecke präzise genug und die Bedienung ist intuitiv. Für den Preis ein wirklich empfehlenswertes Gerät. Einziger kleiner Abzugspunkt: Die Messspitzen könnten etwas hochwertiger sein, aber für den Hobbygebrauch ist das meckern auf hohem Niveau. Fazit: Ein stabiles und gut verarbeitetes Multimeter, das hält, was es verspricht. Wer Wert auf einen funktionalen und hörbaren Signalton legt, macht hier nichts falsch. Und das beleuchtete Display rundet das ganze nochmal ab, falls man mal im dunkeln messen muss. Preis-Leistung einfach Top!
Trustpilot
4 days ago
1 month ago