4-channel 5V Relay Module with Optocoupler for Arduino, Raspberry Pi and PC

This is a 4 channel relay interface board that can be used with an Arduino or Raspberry Pi or PC.
The Raspberry Pi can switch the relays directly because of the optocouplers used to switch the relays.

5V 4 Channel Relay Module
Equipped with high current relay, AC250V 10A; DC30V 10A
Standard interface that can be directly controlled by microcontroller
Relay Output Status Indicator LEDs

Properties:
Operates on 5V
Each input needs 15-20mA Driver Current (an arduino can supply easily)
Switches maximum AC250V 10A or DC30V 10A
Each channel has its own indicator LED.