5V Relay Board Module Optocoupler 1/6 Channel LED for Arduino PiC ARM AVRC
5V 1-CH Relay with Optocoupler. 1 x Optocoupler Driver Relay Module. 2.5V 6-CH Relay with Optocoupler. 5 V 6 Relay Module Channel for Arduino PIC ARM DSP AVR Raspberry Pi. This is 1-Channel high level Relay Module.