Super sound quality, on-board 2W Mono Amplifier (5V power up to 3W) direct speaker, 3.5mm gold-plated headphone sockets can be connected to headphones or external speakers.
With microUSB power supply interface, using mobile power or USB charger to power the mobile phone data cable, can also use 3.7V lithium battery, USB 5V power supply.
Support TF card (in-phone storage card), U disk playback mode.
With horn terminals no soldering required for easy wiring.
Modular design facilitates retrofitting.

Product Features:
1) Support MP3 format, power-on auto-play, the red LED indicator is updated when playing status.
2) Support U disk (test over 32G), TF card (test over 16G) playback mode, power default TF card mode, if the TF card does not exist automatically jump to the USB flash drive mode, and both devices are installed, you can manually set the playback mode, details please see the key operation instructions.
3) Press the key to adjust the upper and lower track switch, volume + +, pause/play, mode switch, please see the button operation instructions.
4) The button can be set "single/Full song" Cycle, power on the default full-cycle, press "Repeat" key to replace the cycle mode

Power supply range: 3.7~5.5v 
Dimensions: 45.72mm * 35.14mm* 12.0mm (L x W x H) 

Package including:
1*MP3 Lossless Decoder Board