Foxnovo 4-Channel DC 5V Safety Relay Shield Module Board with Optocoupler for Arduino DSP AVR PIC ARM TTL Logic Material: durable hard circuit board. 5V 4-Channel Relay interface board, and each one needs 15-20mA Driver Current. Standard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). Equiped with high-current relay, AC250V 10A ; DC30V 10A. Each channel needs 15-20mA. Indication LEDs for Relay output status.