Feature:1. Superior Performance: Bluetooth digital amplifier board has high overload capability, which will not cause cross distortion, transient intermodulation distortion, and don't worry about the internal resistance of speakers.2. Applicable: Bluetooth digital amplifier board is suitable for speaker impedance of 4,6,8 ohms, which is very suitable for turning ordinary speakers into Bluetooth speakers.3. Dual Channel Power Supply, Wide Input Voltage:Bluetooth digital amplifier board has dual channel 45W and 30W power output, and wide input voltage range is from 12V to 28V DC.4. Bluetooth Sound Input, 3.5mm Input: Bluetooth amplifier board supports Bluetooth sound input and 3.5mm sound jack auxiliary input, which has excellent sound quality.5. High Power Output: Bluetooth amplifier board provides a high power output of up to 45W, which can drive 5W100 speakers, speakers, etc. It supports sound cable connection and Bluetooth 5.0 connection.6. Control Keys: Digital amplifier board comes with control keys, which can be controlled by the body keys (volume, play, pause, tune up and down, switch on and off, etc.) when connected via Bluetooth.Specification:Item Type: Digital Amplifier BoardPower Interface: KF301 TerminalInput Voltage: DC 12V-28VInput Current: More Than 3APower Amplifier Chip: TPA3118Output Power: 4 Ohm 2x45W, 8 Ohm 2x30WSNR: 102DbTHD+N: 0.1%Input: 3.5mm Stereo Input, Bluetooth 5.0 Wireless ConnectionOutput: KF301 5.0mm/0.20in Terminal.Package List:1 xDigital Amplifier Board