These are well made units. The standalone ability needs only power, the speaker wires plugging in and a wire to touch the playback pin. More advanced projects can be achieved readily, with several Arduino microcontroller libraries being available to use with them. Playback of up to 3000 different MP3's at up to 48kHz must surely be decent enough specs for any project!One thing to watch out for, is that (in my case anyway) there wasn't enough power from the Arduino to run the speaker at full volume. It makes sense, see the video for volume output! It's wise to run the module from its own 5V feed, rather than have an Arduino supply the power.All in all, great fun and certainly recommended. Shipping was in 2 days, as described.

Great little chip.

Very easy to connect to an Arduino and worked first time out of the gate. Perfect. Will buy more!

For fun, I wired the DAC ports to a powered desktop speaker system and it sounded great, although that's how I intend to use it. I'm driving a small 3W 4Ohm speaker from this, and I really don't need to put it to full volume to get decent sound for my "effects" files. On the software side, I found that depending on the "track completion" message through the serial port was problematic due to conflicts with other components, so I just use the BUSY pin to determine when a track has completed. My one real gripe is that the chip does not remember its last volume setting when re-started, so it always initializes at full volume which draws a lot of power...

These tiny modules are very useful for a range of projects and can easily be connected to the Arduino or other microcontrollers. There is plenty of information available on how to set these up either as stand alone mp3 players or with other devices. The player even has a built in amp (3W) so it can be connected directly to a single speaker and stereo line out is also supported.

I used this module to add audio playback to my Arduino MEGA2560 project. But I'm not using it to play music. Instead, it is providing sound effects and voice messages.Besides 5VDC & Ground, only three other signals (TX, RX, BUSY) were connected to the Arduino. The Arduino library is well documented too. For all the details just google DFRobotDFPlayerMini.Audio quality is very good. My project drives two speakers using a low cost TDA7297 15W amplifier module, like this one:  DROK TDA7297 Mini Digital Amplifier Stereo Audio Amplifier

The mp3 players arrived much earlier than expected. I tested only one of the two but the one I tested works flawlessly!

Uses the correct chip, not the fake ones that other brands use. I bought a 5 pack of another brand and it side fake chips which did not work.