["Description:\r\n\r\nFeatures:\r\nbrand new and high quality.\r\nSwitch Type: NC(normal close type), circuit is connected when magnet is near the switch. \r\nNormally closed: When the solenoid is closed in the vicinity of the switch in the normal position, opens the loop, and if the magnet is removed, the loop is pulled closed.\r\nThe reed switch is an electrical switch operated by an applied magnetic field. \r\nDesigned for use with alarm systems. \r\nEmbedded in door or window frame, for ideal for residential or commercial use. \r\nGreat for use in family and factory window, door. etc. \r\nWith double-sides tape design that for easily install. \r\n\r\nNote: \r\nNo external power supply, connect to wired or wireless alarm control panel GND and N.C ports directly! \r\nPlease note that this item not fit to iron door, It will decline magnetic of the sensor.\r\n\r\nSpecifications:\r\nItem Type: Door Sensor Magnetic Switch\r\nModel: MC-38 \r\nMaterial: ABS\r\nColor: White\r\nCable Length: 26cm/10.24in (Approx.)\r\nRated current: 100mA\r\nRated voltage: 200V DC\r\nOperating distance: more than 15mm, less than 25mm\r\nRated power: 3W\r\nConnecting mode: NC. (normally closed)\r\nQuantity: 1 Set (other accessories demo in the picture is not included)\r\n\r\nNote: \r\n1.Transition: 1cm=10mm=0.39inch\r\n2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\r\n3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n5 Pairs X MC-38 Wired Door Window Sensor (No retail package)\r\n20 X Screw"]