3pcs 12-24V Dual Relay 7812+UPC1237 Speaker Protection Board Module DIY Kit For HIFI

Features: 1.UPC1237 best performance as core devices, with power-on delay and DC protection, power anti-shock function 2.Use OMRIN original high-current relay as the core of the device is not afraid of contact ignition and oxidation 3.Using 7812 as a regulator, wide supply range, up to any range AC12V to AC24V 4.Circuit is simple and reliable. Produced very easily, no need debugging 5.Silver contacts. 6.Precision CNC double-sided circuit board tin small size, easy installed 7.Start delay 1S closed, no need to use 3S delay. DC monitoring and protection, real-time protection speaker. Disconnect the speaker off instantly. 8.This version can be controlled 500W amplifier, each channel using a relay control. 9.Power: AC 12-24V 10.PCB size: 6.9cmx57mm Note: All the elements, you need to solder it by yourself Package included: 3 x Dual Relay 7812+UPC1237 Speaker Protection Board Kit