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✅GREAT FOR SWITCHING LOADS - helpful for switching large loads via Arduino, Raspberry Pi and Co. ✅EASY HANDLING - that's because of it's two digital inputs, no library / program library necessary! ✅PRACTICAL AND QUICL COMMISSIONING - thanks to pin header and screw terminal ✅CONTROL - The control is consists of VCC, GND and two digital input pins. The relay switches when GND is present on the input. ✅HAS TWO LEDS! Please also note the information below when using a Raspberry Pi.