I ordered this to modify a Spirit Halloween Ghostbusters Walkie Talkie, which had a preprogrammed sound unit with a single (and repetitive) audio file. I was able to access online (through a link on GBFans) the original audio files from the Ghostbusters video game, downloaded and converted them to smaller MP3 files, then loaded them onto this unit. It went flawlessly.This unit has multiple playback modes that can be adjusted, but does not have a multiple file shuffle or random playback mode. By it's default setting, it will play the files in the sequence you load them. In my case, I wanted to maintain a certain order of playback so it would resemble a conversation the Ghostbuster characters were having, so I applied a 3 digit number to the front of each file name.Easy to use, can be adapted for multiple uses, perfect for what I needed.

Used these to make some personalized gift and they turned out stunning! Easy to use, the sound was pretty good for the size, and over all very happy with the kit.

Works well, easy to use and seems well made.

Muy buen dispositivo

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It came with a single double-sided printed page of instructions. while that was not exactly impressive, it did the job. You are left guessing a bit at some functions. The USB-C interface is a snug fit.. with a delicate device it is a bit anxiety-inducing when removing the USB-C cable. Things to know:- the config.txt file has one line "IO=1" and it can be 1 to 6. Copy and paste the next part into a readme for yourself for your own reference... the language is mostly theirs, not mine..IO=01 pulse repeatable - key can interrupt - press to play, while playing, press again for next songIO=02 pulse not repeatable - key cannot interrupt - press it to play, in the process of playing - invalid if you press it againIO=03 level remains recyclable 1 - keep loop playing press and release to stop immediatelyIO=04 level remains recyclable 2 - if you press it all the time, it will play in a loop, once it is released the current music will stop playingIO=05 play/pause - press to play, press to pause, press to continueIO=06 play/stop - press to play, press to stop-There is a folder for the music.. that's where you drop the MP3 files you want it to play. It uses alpha-order when you have multiple files for teh modes that will play one file and move to the next...- it comes with one MP3 snipped in that folder and one in the root folder. I don't think it plays from the root folder at all.-The file transfer is a little slow..and it has 16MB of storage or so. I dropped in about 14MB of MP3 files and it nearly filled it... but that was 9 Christmas tunes to go with a snow globe.-I will need rubber feet to lift the snowglobe up to fit this device beneath it. and will likely need some way to attach it to the base, perhaps exposing the power switch and button.. but will likely have to remove it to charge it via the USB-C.-I tested the device on its anti-static packaging and I thought I have a bad device as the speaker sounded torn or cracked.. but when I moved it to a solid surface it was fine.-My PC gave some kind of error when I plugged it in but I just ignored it. I had it in a USB3 port and its best to use in a USB2 port.-Interestingly, when plugged in, it acts like the PC's speaker.. playing media played on the speaker.-I have not figured out if I can just leave it turned on (there is a slide-switch for on/off) and use it to play or restart.. don't know how long it will last ON and not playing. IO=0 mode (which is default) allows you to switch between songs using the button.. but doesn't seem to allow you to turn it off.. so I had to use the switch for that (EDIT: Have had it "on" for months.. playing only if somoen presses button.. barely gets played but battery has not drained so much that it will not play)- the volume button is one of those cycling settings.. that is you click it to raise volume to next level and it cycles back to low volume setting eventually. level 2 is my preferred setting.Overall I found it a good device 2-pack. Would buy again should need arise. Craftier folk can probably make great use of this.