Product specifications:
Power range: 3.7~5.5V
Product size: 45mm*36mm
Exquisite double board design, large area of copper, stable and reliable.

Features:
- Superior sound quality.Onboard 2Wmonoamplifier(5V power of up to 3W) is directly connected to the speaker(recommendation 4Ω3Wspeakers),3.5mm gold plated headphone jack can connect with headphones or external audio.
- With a Micro USB port.Through the mobile phone data line can use mobile power supply or the USB cable to charge the MP3 battery,also can use 3.7V lithium battery,or USB 5V power supply.
- Support TF Card(mobile phone memory card) and U disk play mode.
- No soldering with speaker terminals for easy wiring.
- The module is designed to facilitate modification.

Key Operating Instructions:
"Prev / V--" button: "Press" for switching previous song, "long press" for volume down
"Next/v++" button: "Press" for switching next song, "long press" for volume up.
"P / P / Mode" button: "Press" for the "Play/Pause" Switch, "long press" for U disk, TF card mode.
"Repeat" button: "Press" for “single/all song" mode(no long press)

Note:
1."Long press" approximate 2S.
2 .If you use U disk mode, it is recommended 5V power supply, and some U disk does not support 3.7V power supply.

Package included:
6 x TF card U disk MP3 Format decoder board module amplifier decoding audio Player