TF Card U Disk Play MP3 Decoder Player Module with Audio Amplifier Audio Decoding Player Module Micro USB 5V Power Supply

The MP3 player is easy to hook up and works well. It plays MP3s from a micro SD card or a USB drive or both. I found that it will automatically play whichever is plugged in. Or it will switch to the new one when one is plugged in. With the forward and back buttons I could step through the tracks from the SD card to the USB drive and back. I assume if I let it play it would play tracks across both from SD cart to USB although I haven't let it run that long. It also rememberd where I was when I powered it off and started back where I was when powered back on. I got sufficient volume from the speaker connection for anything I would want it for. The volume on the headphone jack was much lower. The headphone jack will work for headphones but won't drive a speaker without external amplification. At high volume there is some noticeable white noise. The only drawback I found is that it is mono not stereo. It has volume buttons (long press) and previous and next track buttons (short press). It doesn't have skip forward and back buttons which I find a requirement for listening to audio books or podcasts. It has a repeat track mode button and play/pause. Long pressing play/pause is supposed to switch back and forth between the SD card and USB drive but that didn't work.

This decoder/player worked great for my project; a background noise generator. I recorded an air conditioner running and converted it to an MP3 file. Saved it to a micro SD card and plugged it into the player. Now when it's powered up, it plays the file. Easy. The board uses a GDP2856A chip for the decoding. Search Google for GDP2856A and you'll see that it has additional features (Repeat, Equalizer, Stereo output) that you can use if you have some electronics knowledge. You can interface it with an Arduino or other microcontroller too. Great value for the price. Paired with an appropriate speaker, (4 Ohm, high efficiency) the 2 watt output is more than enough to get the job done. See video- background noise, volume up, song playing.

This unit works well. For my application, I wanted something that would power up and start playing, which it does. It "remembers" the song played and remembers its "repeat" state. The LED blinks slow for normal play, fast for repeat play. As others have noted, there are no mounting holes or even very much empty board space for mounting. I didn't need the mono "speaker" output or the TF reader, so I soldered mounts to those pads. Also, the "batt" input isn't documented. There are vias through the + and - power leads and this makes them pretty easy to use. Hopefully secure that the pads won't pull off. I found the push buttons are so close together that it's difficult to get all four panel holes and mounts close enough together to engage them. It would have been nice if the layout put them farther apart. I'll probably solder leads across "Play/pause" and use a momentary remote switch, since this is the one my application needs most. These pads do NOT have vias, so it will be important to strain-relieve them, somehow. Overall one point off because it doesn't seem much thought went into mounting. Two points off "thickness" because it's so irregular as to make it hard to mount with buttons and LED facing the panel. If you're going to mount to the back of a box and poke at the buttons from the front, then it would be fine.

I use this to play my green noise all night. Works great.

I use the audio out port to input to any Bluetooth speaker that has an audio port. You could even plug it in to a car's AUX port. This is the MOST COST EFFECTIVE way to play USB Drives with music on them. You can even connect a speaker to the connector on board. This device will play any size USB or Micro SD card. It is powered by a typical phone charging cable (with a micro USB end). All you will need to play music is the charging cable I just mentioned and an audio cable (male to male stereo miniature phone cable), and of course your car or whatever AUX device you want to use. You can also use ear buds.

Order came the next day. I used it to make a back-up warning horn for my golf cart. An mp3 file was dragged to a micro SD card on my computer, placed in the board socket, power applied (5volts from a cell phone charger micro USB), ear buds plugged in and viola! It just started automatically playing the file as soon as power was applied, which is what I wanted! The downside is by itself, it's not very powerful. Good enough for earbuds, but not for a speaker. I hooked it up to a sound amplifier (TDA7297 Audio Amplifier Board ) and it is quite loud enough for my purpose. Since the sound board worked just the way I wanted it to right out of the box, I haven't explored any of its other features, other than adjusting volume output.

I like this small MP3 module - easy to use (manually) and the sound quality is decent. I'd recommend some improvements: 1) Put some headers on the board so one can (easily) connect the buttons to external controllers - I had to solder wires to the ends of the tiny button connections so I could interface this with a NodeMCU (or Arduino) for my purposes. It was a pain in the butt, but I managed. 2) Ability to set boot options (that are stored/remembered for the next boot). The default on boot is that it starts playing the first .mp3 file on the card - that seems daft to me. The default should be no sound on boot, and that you trigger the playing of .mp3s by pressing the button - or at least have a way to toggle that (perhaps with a couple of header pins on the board). 3) Include some documentation with the board - there is none. There are locations to solder battery connections (BAT+ and BAT-) on the board - and one ASSUMES that, because the default power source is USB, that 5v is what's needed, the same could be said of other boards (e.g. some ESP8266) that are 3.3v and would be fried if you applied 5v to VCC. 4) It would also be great to be able to access the button functions via the micro-USB port programmatically - perhaps there is, but with no documentation, no one knows.

Not bad for the price. Used to add ambient noise to my arcade when smart switch turns everything on. Couldn't get Micro SD card slot to work on two separate units, and was having random audio drop outs until I lowered bit rate on the MP3 I was playing and used a smaller thumb drive formatted to FAT 32. Not sure if all was needed but that combo made it successfully run all night. Needs better specs and instructions.