Features:<br> 100% brand new and high quality.<br> White surface mount magnetic contact reed switch kit with pigtail for home metal door or window security alarm system.<br> Normally closed type, when the switch and magnet is close to each other the switch is closed, otherwise it will be open.<br> The reed switch is an electrical switch operated by an applied magnetic field.<br> Designed for use with alarm systems.<br> Great for use in family and factory window, door. etc.<br> With double-sides tape design that for easily install.<br> <br> Note:<br> No external power supply, connect to wired or wireless alarm control panel GND and N.C ports directly<br> <br> Please note that this item not fit to iron door, It will decline magnetic of the sensor.<br> <br> Specifications:<br> Item Type: Door Sensor Magnetic Switch<br> Material: ABS<br> Model: MC-31<br> Color: White<br> Size: 6.22cm/2.440.79in (Approx.)<br> Actuation Distance: 16mm<br> Rated current: 100mA<br> Rated voltage: 100V DC<br> Operating distance: more than 15mm, less than 25mm<br> Rated power: 3W<br> Connecting mode: NC. (normally closed)<br> Quantity: 1 Set (other accessories demo in the picture is not included)<br> <br> Note:<br> 1.Transition: 1cm=10mm=0.39inch<br> 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.<br> 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you<br> <br> Package includes:<br> 5 Pairs X MC-31 Wired Door Window Sensor (No retail package)<br> 20 X Screw