Seeit USB-RELAY04 Relay for Relay Control Card for Arduino, AVR, PIC, Raspberry Pi, TTL

The Seeit 4 channel interface board which can control various appliances, and other equipments by its relay modules interface which is controlled directly by a computer through the USB port and USB driver and this board is equipped with high current relay modules.

Interface micro USB port or serial port on HE 10 connector
Power supply 5Vdc, 1A
Port speed 9600 bds