TDA7388 is a four-channel automotive- IC. This chip adopts the output mode, with few peripheral components good sound quality, and is also convenient to install. 14.5V, this product is a four-channel power amplifier module, using the most common power supply mode, the design concept is also with the overall effect of the IC Product Name: Bluetooth Power Amplifier Board Type: Power Amplifier Module Chip: TDA7388 Supply voltage: DC12-14.5V Output power: 4*41W Product size: 80x50x40mm Colour:blue :PCB+Metal Package Contents: 1 x Amplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.