5V 8-Channel Relay interface board, each one needs 15-20mA Driver Current; Equiped with high-current relay, AC250V 10A ; DC30V 10A.
Relay Module Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
8 relay module selection of high-quality loose relay, single-pole double-throw. A common end, a normally open end, a normally closed end.Can be selected by jumper relay and TTL or ground.
Indication LED's for Relay output status.Safe,Optocoupler isolation, good anti-interference.
Size:14cm x 5.7cm x 1.7cm (5.51inch x2.24inch x 0.67inch) http://wiki.sunfounder.cc/index.php?title=8_Channel_5V_Relay_Module