MH-M38 MP3 Stereo Audio Amplifier Via Bluetooth

Bluetooth V4.2 version, Bluetooth connection technology supported, lossless WAV/WMA/FLAC/APE/MP3 decoding, stereo two-channel output.
After turning on the module, the mobile phone or laptop will search for the Bluetooth name MH-M38 and can play music after connecting to Bluetooth.

Blue indicator light of the module:
When there is no Bluetooth connected, the light will flash quickly.
When the Bluetooth connection is enabled, the indicator light will light up.

Power supply: You can use the micro USB Android cable (5V) directly for power, or you can connect a 5V power supply or a 3.7V lithium battery (see below). Note that the 5V and 3.7V power interfaces are different. The 5V voltage is connected to 5V and GND, and the 3.7V lithium battery is connected to VBAT and GND.
The maximum operating current is 5V 2A. It is recommended to use a regulated 5V2A power supply for better sound quality.
Supports USB sound card, free drive (plug and play). Connect the module to your computer with a USB cable, and the computer can play music through the output of the modular amplifier.
Audio Output: Output left and right stereo audio signals, which can be connected to two 2-8 ohm, 3-5W speakers and 4 ohm 5W speakers.
5W onboard amplifier: This product has its own 5W power amplifier and should not be connected to another amplifier. The outputs of the two amplifiers must not be connected in parallel, or the negative terminals may be connected together, otherwise the amplifier chip may be damaged.