ITEM NAME:Metal Store Roller Shutter Door Contact Alarm Magnetic Reed Switch B1D8 Metal Store Roller Shutter Door Contact Alarm Magnetic Reed Switch B1D8 Product Name : DoorMagnetic Switch;Model : MC-56 Rated Current : 500mA;Rated Voltage : 100V DC;Rated Power : 10W Operating Distance : 40-60mm;Cable Length : 26cm;Size(Approx) : 4.8 x 2.5 x 1.5cm (L*W*H) Color : As Picture Show;Housing Material : Metal Weight : 157g Switch Type: NO(normal open type), circuit is connected when magnet is near the switch Package Content : 1 x DoorMagnetic Switch 4 x Screws 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.