Features 1、GOOD PROTECTION: The speaker protection board is designed and manufactured by UPC1237 special chip, with power on delay and DC protection, instant shutdown function, comprehensive protection of your expensive speakers 2、SPRAYED BOARD: The board is made of 1.6mm thick and high FR‑4 board, tin foil is sprayed, the 10A relay is of excellent music quality, and the resistance ring is gold film resistance copper feet 3、SINGLE VOLTAGE: The protection board adopts a single power supply voltage of AC 10V‑18V and DC 12‑24V, which can send a group of electric energy to the amplifier board 4、RELIABLE PCB: Adopt excellent PCB materials, with reliability and miniaturization, good maintenance and interchangeability 5、PROTECTIVE AND STABLE: Amplifier midpoint potential protection, all finished boards are good debugging and power test Specification Item Type: Speaker Protection Circuit Board Material: PCB Color: Green, blue Package List 1 x Speaker Protection Circuit Board