Features 1、Better Performance: Digital power amplifiers have higher overdrive capacity than analog power amplifiers, and will not cause crossover distortion, transient intermodulation distortion, and no need to worry about speaker internal resistance 2、2 Channel: This is clear bluetooth digital power amplifier board, which adopts 2 channel stereo design, and is easy to use 3、Good Sound: The sound quality is very good thanks to the use of this audios amplifier sound module, can use with confidence 4、Bluetooth Audios: This clear digital power amplifier board supports Bluetooth audios input, and the maximum receiving distance is 20 meters 5、Basic Specifications: The channel of this clear bluetooth digital power amplifier board is dual channel output, and the output impedance is 4~8ohm speakers Specification Item Type: Digital Power Amplifier Board Chip Type: TPA3118 Chip Protection: Over Voltage, Under Voltage, Over Temperature, DC Detection, Short Circuit Supply Voltage: DC12-28V Input: 3.5mm AUX, Bluetooth (Default Bluetooth Priority) Output Power: 45W x 2 Channel: Dual Channel Output Output Impedance: 4~8ohm Speaker Size: Approx. 71 x 52 x 13mm / 2.80 x 2.05 x 0.51in Color: Blue Material: ABS Maximum Receiving Distance: Approx. 20 meters / 65.62ft Package List 1 x Digital Power Amplifier Board