XH-A105 Bluetooth 5.0 TDA7498 Digital Amplifier Board 2x100W Stereo Audio AMP Module Support TF Card AUX This digital power amplifier board with high fidelity and two-channel stereo sound quality; input voltage is DC 12~30V, audio input supports Bluetooth, TF card, AUX 3.5mm audio line input, can be directly connected to mobile phone, MP3, etc.; power amplifier board It also comes with a volume adjustment function, which rotates the potentiometer clockwise to zoom in and counterclockwise to decrease. Product Name: Two-channel Bluetooth 5.0 power amplifier board Input voltage: DC12-30V. Amp Chip:TDA7498 Output impedance:4~8 ohm Speaker. Support Format:FLAC/APE/MP3/WMA/WAV. Current: ≥3A. Output power: 100W x 2. Audio input: Bluetooth, TF card, AUX Number of channels: two channels Size: 92 x 85 x 10MM Installation aperture: 3MM Installation hole distance: 85 x 5 x 78.5MM Bluetooth operation instructions: When the power amplifier board is connected to the power supply and the Bluetooth is not connected, the Bluetooth indicator flash . When the Bluetooth connection is successful, the Bluetooth indicator stop flashing. When the song is played, the Bluetooth indicator flash slowly. Note: 1. Connect the power input to the DC12-30V power supply. When the power is on, the power indicator light red and the blue light flash blue. 2. Connect the audio input to the audio source, such as MP3, mobile phone, computer, TF card, etc. 3. Connect the audio output to the speaker, paying attention to the positive and negative. Bluetooth / TF card volume hole: When the audio input uses Bluetooth or TF card, you can connect the power cord to the "+ VOL -" three holes to adjust the volume and switch songs. 1. "+" and "VOL" connection: short connection to play the previous song, long connection to increase the volume 2. "-" and "VOL" connection: short connection to play song, long co