This bluetooth audio amplifier module is a good choice to replace the one, it can good performance. The 2.1 channel amplifier board is easy to install and , convenient to replace. The 2.1 channel amplifier module can a stable and fast connection and has a wide compatibility. The amplifier board provides two ways of input: bluetooth and AUX input. The amplifier module allows you to adjust frequency, volume, treble, , etc. Size: 118x100x22mm. Bluetooth Version: 5.0(no shielding, 10m). Input sensitivity: 500mV. Audio Input: AUX+Bluetooth. Channel: 2.1. Chip: TPA3116D2. : DC12-24V/5A. Adapter speaker: 20-100W, 4-8ohm. Output : Max.50W.(R and L channel), Max.100W(subwoofer) Colour:black Material: ABS Package Contents: 1 Set x amplifier board. 1 x English User manual Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.