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 its 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.