🔊 2-Pack Onyehn Bluetooth Audio Receiver Board 4.2 MP3 Lossless Decoder - Wireless Stereo Music Audio Modification - 5W+5W Car Speaker Amplifier Review

After successful pairing, if the power is turned on for the second time, the module will automatically connect and do not need to be paired again. The module does not support reverse connection protection, so the power supply must not be reversed, otherwise the module will be damaged. .Working voltage is DC 3.7V-5V.Module will be damaged if input voltage is more than 5.5V. It is recommended to input 5V 1A.If the power supply is insufficient, the speaker sound will be small. When the power supply is seriously insufficient, the speaker will make a "tick" sound or even no sound. It is recommended to connect 2pcs 4 ohm 3W (5W) speakers; if connect 2ohm speakers, the power amplifier chip will heat up, causing the chip to burn.