["Features:\nWhite wired magnetic contact reed switch kit for home door or window security alarm system\nNormally closed type, When the magnet is near, the switch connects. When the magnet is away from the switch, the switch is disconnected.\nEach part is equipped with double-sided foam adhesive, effortless to install\n\nWorking Principle: \nThe magnetic reed switch is consist of switch and the magnet, and the switch parts is made of reed switch and the pigtail. The magnet is coved by the plastic or alloy for shell. When the switch and the magnet is apart form or close to each other in the certain range, the switch will turn on or off automatically, thus it will inform the installed items's place changing.\n\nSpecifications:\nModel: MC-38\nColor: White\nVoltage: for DC 100-110V \nRated Power: 10W \nContact Capacity: 0.5Amp Current Switching Maximum \nDistance Distance: 12-24mm\nOne size fits all: Approx. 2.7x1.3x0.8cm/1.06x0.51x0.31\"\nQuantity: 5 Sets\nNote:\nPlease allow 0-1mm error due to manual measurement. pls make sure you do not mind before you bid\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nNo Retail Package\nPackage Contents:\n5 Sets x MC-38 Wired Door Window Sensor"]