1 pcs 12V 1 channel relay module & 75Pcs Type PC Crown Gear1 channel relay module, with photoelectric isolationHigh or Low level changeable(by a jumper setting trigger)The module uses quality relayWith power and relay action indicator12V 1 channel relay module:Operating voltage: 12VMaterial: CCLColor: redMaximum load: AC 250V / 10A, DC 30V / 10ASize:44 x 24 x 17mmPins:DC+: Positive power supply (VCC)(12V)DC-: Negative power supply (GND)IN: The control end, the driving current should be more than 4mACOM: The control of loop of earth wireGND: GroundNotice:High Level Mode: the jumper is set between com and gnd (original).Low Level Mode: take down the jumper, connect VCC to VCC, GND to Control Terminal, IN to 5V, COM to GND.gear:Material:PCType:spindle gear,crown gear,sigle gear,double gear,worn gear,bevel gear,belt pulley,belt,connecting rack,axle sleeve,tee collarColor: picture colorPackage Contents:1 x 12V 1 channel relay module19 x Double Reduction Gear(each one)12 x Single Reduction Gear(each one)11 x Crow Gear(each one)2 x Worm Gear(each one)9 x Spindle Gear(each one)7 x Belt Pulley(each one)6 x Axle Sleeve(each one)5 x Belt(each one)2 x Connectiong Rack(each one)1 x Tee CollarOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.