Module highlights:

● Super sound quality, onboard 2W mono power amplifier (5V power supply up to 3W) directly connected to speakers (4Ω 3W speakers are recommended), 3.5mm gold-plated headphone socket can be connected to headphones or external speakers.
● With MicroUSB power supply interface, use mobile power or USB charger to supply power through the mobile phone data line, or 3.7V lithium battery, USB 5V power supply.

● Support TF card (mobile phone internal storage card), U disk play mode.
● The terminal with horn does not require welding, which is convenient for wiring.
● The modular design is convenient for modification.

product description:

1) Support MP3 format, auto play after power-on, and update the red LED indicator when playing.
2) Support U disk (32G tested), TF card (16G tested) playback mode; power on the default TF card mode, if there is no TF card, it will automatically jump to U disk mode, and both devices are installed, you can manually Set the playback mode, please refer to the button operation instructions for details.
3) Press the button to adjust the upper and lower track switching, volume +-, pause/play, mode switching, please refer to the button operation instructions for details.
4) Press the button to set the "single/full song" cycle, the default full song cycle after power-on, press the "Repeat" button to change the cycle mode

Key operation instructions

"Prev/V--" key: "Short press" to switch the "previous" song, "long press" to "decrease volume"
"Next/v++" key: "short press" to switch to "next" song, "long press" to "volume increase"
"P/P/Mode" key: "Short press" for "play/pause" switch, "long press" for U disk, TF card "mode" selection
"Repeat" key: "Short press", it is "single song/full song" cycle switch (no long press function)

Note: 1. "Long press" time is about 2S
2. If you use USB flash drive mode, 5V power supply is recommended. Some USB flash drives do not support 3.7V power supply.

Product parameters:

Product name: mp3 lossless decoder board (support TF card/U disk)
Power supply range: 3.7~5.5V
Product size: 45.72mm * 35.14mm* 12.0mm (length x width x height)
Color: blue product weight: 11.3g (including packaging)
Packaging: Single module electrostatic bag packaging Material: FR4 + electronic components

Schematic diagram:http://www.chipkingdom.com/upfile/201531917474080714.pdf