Item Type: Power Amplifier Board Condition: 100% brand new Material: PCB Chip Type: TPA3116D2x1 Input Voltage: DC12-28V Output Power: Maximum 120Wx2 Number of Sound Channels: Double channels Product Size: Approx. 92x68x16mm/3.6x2.7x0.6in Installation Size: Approx. 85.5x62mm/3.4x2.4in, aperture about 3.2mm/0.13in Package List 1 x Power Amplifier Board 1 x 3pin Audio Cable Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1The product supports dual sound channel, high power, bringing shocking volume. 2Input voltage of DC12-28V, and DC24V is recommended, stable performance. 3Equipped with onboard operational amplifier chip TL074C and PA3116 power amplifier chip. 4The input sound source is amplified first by the operational amplifier chip and then by the amplifier chip to make the volume more shocking. 5Aluminum alloy heat sink for efficient heat dissipation, better using experience.