Raynic White Noise Machine, Battery Powered Sound Machine, Portable Sleep Machine with 24 Natural Soothing Sounds, Timer, USB Port, Headphone Jack for Baby, Kids, Adults, Travel, Office, Home (Silver)

We bought this for my son when he was little, and as-is it has been the perfect sleep time companion. However, in recent weeks we noticed the included power cable had worn through. It's no big deal, I'm more than capable of resolving it. Rather than opt for a replacement cable, I purchased some USB-C panel mount plugs, which is perfect since I always have them handy and no longer care to keep the warranty intact (great upgrade if you can swing it) Through the upgrade process, I noticed something I didn't expect. There was a MICRO SD card slot with a no-name 4gb card. Out of curiosity, I loaded into my PC, and was surprised to see that it was formatted as fat32 with raw MP3 files, organized in folders based on the button that is pressed. Each file is a 4hr long loop, but it's not necessary (at least it doesn't seem to be). Me being curious, I went to YouTube, found a public domain rendition of Brahms Luluby, loaded into a free online MP3 converter, and dumped it in one of the folders. A short reassembly proved that it worked! It seems to be a basic MP3 player that is set to repeat the current song and uses the buttons to select the playlist. Each song repeats without additional input. I finished my modifications, loaded it with tunes (I opted to remove all of the bird songs, but wasn't necessary), and now I have a fully functional, custom sleep machine. While am unintended feauture, would definitely recommend for those willing to tinker a bit. Aside from all of that though, the battery circuit could use a redesign. It basically runs in parallel with a blocking diode, which explains the poor battery life when plugged in with the batteries installed. It's enough to keep the USB from blowing up the battery, but not enough to keep the batteries and the USB from both powering the device. Would recommend picking one or the other to use. Notes for future models: USB C power, proper battery switch circuit, externally accessible SD for customization

I wanted a sound machine instead of always using my phone for background ambience while I sleep. I live in an area that is prone to power outages during summer storms, and I wanted a way to maintain sleep sound that used conventional batteries as a backup, not dependent on USB charging. I thought I’d try this one but was skeptical of the sound quality. This machine surpasses my expectations. The sound quality is quite good and there are 24 options (each sound button can be pressed to choose one of three sound patterns). The volume is easy to adjust and is loud enough to be heard from a bedside table. This machine would be ideal for travel. There is a headphone jack if privacy is needed. There are two USB ports for charging devices when the machine is plugged in (not on battery power). I’ve already noticed an improvement in my sleep quality. I am pleased with this product.

This white noise machine is easy to use. Appreciate the variety of sound choices and the timer feature is very helpful. Excellent product and good quality for the price. Would definitely recommend this product to others.

I read a lot of sound machine reviews before picking this unit. Price was a major factor, in that, if it wasn't good enough it wasn't so expensive to replace. A lot of people complained about the volume control not functioning well. Some people went to the trouble of opening the unit to spray the contacts on the volume control to try to correct the problem. I have owned a simaliar looking product (possibly the same manufacturer) for many years and have had to wiggle and jiggle the volume control knob to get a steady sound. So I knew what to expect with this unit. So far there has been no trouble with the volumecontrol. But, every so often it stops making noise. It immediately starts back up again. As far as I know it has never awakened me but when awake I hear it stutter now and then. Not a good thing for the unit to be doing and I am afraid it will someday not start back up. I am concerned for the units longevity. The types of sounds and being able to choose between three different forms of these sounds is amazing. I have found some very soothing sounds and I switch between these on a regular basis. I have owned many sound machines. Some of these machines are very compact for travel (hence the 3 stars for traveling). None of these machines have offered such a variety of sounds. As far as sounds go, they get 5 stars.

It is a great product I would recommend it to everyone who would like to relax and sleep better.

Excellent for sleeping or napping. Runs on 3 batteries or a USB plug, can be set to run continuous (or shut off after a period of time if you want that). Has ocean waves, croaking frogs, crickets, white noise, pink noise, fan sounds and a lot more.

I like the sound of the waves for my tinnitus because I love the beach and use only that one. There is variety enough to find your favourite. I like the timer with three settings and the choice to use the battery. With the timer the battery life will be extended.

As advertised

Pretty good product, some sounds aren't my thing but at like 4 are. Product is loud and works great. I wanted one that didnt have a timer

Works well so far. It has quite a few options although we only use the fan it could be interesting to try other options. What I like is the fact that it also works on batteries so in the middle of the night when the power goes out, the batteries kick in or if you go camping and there's no electricity, you still have your noise machine.

For the cost and value this unit is excellent. I’m using it for the first time in my hotel room during my annual work deployment meeting. Ventilation system is so loud, when it kicks on and off it used to wake me. I didn’t hear a thing last night I slept soundly the whole night. I didn’t hear people talking in the hallway. I love that it has the capability to be used when the power goes out with a few batteries I live in the country so power outages happen quite often and I find it hard to fall asleep again when I can’t hear the fan.