2-channel 2 way 5v relay shield module with opticalcoupler protection for arduino arm pic avr dsp
Relay Module - 2 Channel 5V
Amazon.com: DAOKI 5 PCS 5v Relay Module for Arduino ARM PIC AVR MCU 5V Indicator Light LED 1 Channel Relay Module Works with Official Arduino Boards : Industrial & Scientific
5V DC 2-Channel Solid-State Relay Board for Arduino