Chip protection: overvoltage / undervoltage / overheating / DC detection / short circuit Supply voltage: DC12-24V Output power: 80Wx2 Product model number: XH-M567 Chip type: TPA3116D2 High-efficiency class D operation, with > 90% power efficiency and low idle loss characteristics, advanced modulation system configuration, multiple switching frequencies, and AM interference prevention; The TPA3116D2 advanced oscillator / PLL circuit uses multiple switching frequency to suppress AM interference. When used with the master-slave mode option, multiple devices can also be synchronized; ainst short circuit, overheating, overvoltage, undervoltage and DC faults. In the event of an overload condition, the device reports the fault condition to the processor, thereby avoiding own damage. Note: The general power supply and power amplifier should be at a certain distance to avoid electromagnetic interference. It is better to use a high quality power supply and the power supply will be stable. If you use a power supply such as a transformer, it is best to cover the transformer with a metal cover to prevent electromagnetic interference. colour:Blue Material:metal + PC size:60*32*14mm Package Contents: 1 X XH-M567 double channel digital amplifier board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.