SMAKN&reg; 5V 30A 1-Channel Relay Module with Optocoupler High/Low Level Trigger Relay Module Product Name : Optocoupler Driver Relay Module;Model : SLA-05VDC-SL-C;Coil Voltage : DC 5V Channel : 1 Channel;Trigger Type : High Low Level Trigger;Contact Voltage : 1HP AC 120V1/2HP AC 240VAC 240V 30A Fixing Hole Dia : 3mm/0.12";Fixing Hole Center Distance : 44 x 27.5mm/1.7" x 1.1"(L*W);Size : 50 x 33 x 22mm/2" x 1.3" x 0.87" (L*W*H) Color : Red;Material : Electronic Parts Weight : 86g;Package : 1 x Optocoupler Driver Relay Module