SainSmart 16-CH USB HID Programmable Control Relay Module Programmable: Offer codes for you to program Convenience: Also offer GuiApp for download to use simply and directly 5V Multi-Channel Relay interface board, and each one needs 15-20mA Driver Current Equipped with high-current relay (AC250V 10A/ DC30V 10A) , and Indication LED's for Relay output status Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP431, TTL logic)