Brand N/A Model N/A Quantity 1 Color Blue Material The PCB + plastic + iron Features On-board EL817 optocoupler with optical isolation and strong anti-jamming capability; Onboard 5V 30A/250VAC 30A/30VDC relay relay has long life of continuous pull 100000 times; Specification Can be directly and single-chip I / O link with the output signal indicates; Has a freewheeling diode protection short response time; Has a normally open (NO) normally closed (NC) output Application For your DIY project English Manual/Spec No Packing List 1 x C type replay module