This is a 4-channel solid state relay board module. Its input voltage is DC 5V to 12V, the controlled voltage of the relay is AC 24V to 380V, and the maximum current is 8A. We provide KF301 green input wiring terminals and KF1000-2P output wiring terminals, so you can install and operate the relay conveniently and safelyifications: Input Voltage Range: DC 5V to 12V Input Control Signal Voltage: High and low voltage level can be set (short circuit boards welding on the back plate, the default is low voltage level) Weight: 148g(approx.) Input Interface: DC+ DC- CH4: 4 channels relay module signal triggering endPackage Includes: 1×Relay Module