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Switching large loads – switch e.g. lamps and sockets via Arduino, ESP32, Raspberry Pi, STM32 etc. Eight digital inputs – easy to use thanks to eight digital inputs, no library/program library required Ready to use – practical and quick commissioning thanks to pin header and screw terminal. Easy to control – the control consists of VCC, GND and eight digital input pins. The relay switches on the input when GND is attached. Features 8 status LEDs! Please also note the instructions described below when using with a Raspberry Pi.