Speaker protection board Technical parameters: 1. Working voltage: AC 110V~220V 2. Job type: Left and right dual channel 3.Board size: 61.75mm x 95.5mm 4. Height 21.5mm Circuit design features: Adopting C1237 dedicated speaker protection chip The relay can withstand a current of 30A The onboard 110V~220V switching power supply supplies power to the protection board The amplifier board adopts a double-sided PCB design, with 1% precision Japanese metal film resistors and Japanese electrolytic capacitors Color: Black Material: plastic Package Contents: 1 x switch protection 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.