M38 Wireless Bluetooth-compatible MP3 Audio Receiver Board with Built-in 5W+5W Amplifier BLT 4.2 High Fidelity Hi-Fi Lossless Decoder Module DIY Kit
Feature:
1. Power supply: You can directly use a MICRO USB cable 5V to directly supply power, or you can also connect to a 5V power supply or a 3.7V lithium battery. (Note that the power supply interface of 5V and 3.7V is different. 5V is connected to 5V and GND, and 3.7V lithium battery is connected to VBAT and GND. )2. The maximum operating current is 5V 2A. It is recommended to use a 5V 2A regulated power supply for better sound quality.
3. Support USB sound card, driver free (plug and play). Connect the module to the computer with a USB data cable, and the computer can play music through the module's amplifier output.
4. Audio output: Output left and right channel stereo audio signals, which can be connected to two 2-8 ohm and 3-5W speakers respectively, and 4 ohm 5W speakers are recommended for storage.
5. This product has built-in dual 5W power amplifier circuit, you must not use another power amplifier! The output of the two power amplifiers cannot be connected in parallel or the negative pole is connected together, otherwise the power amplifier chip will be damaged.

Specification:
Product size: 45*20*3mm/1.77*0.79*0.12"

Note:
1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor.