Based on Raspberry Pi 40pin GPIO interface, suitable for Raspberry Pi series motherboards; Adopting high-quality relays, allowing
access to loads: 5A 250VAC or 5A 30V DC; With optocoupler isolation to avoid interference from high-voltage circuits; Equipped with relay indicator light for easy viewing of the working status of the relay; Equipped with relay selection jumper cap for easy switching of Raspberry Pi and other pins for control