Features: 3.The shell is made of high-quality raw materials and insulation and sealing technology.4.Small and exquisite, light weight, easy to install and highly concealable.5.This product is a signal switch that can be installed on wooden doors and windows.Working Principle:NC (meaning normally closed): When the magnets are combined, the circuit is conductive when the magnets are separated, the circuit is not conductive Specifications:Model: Replacement for XL-55Sensing distance: 50-70mmRated current: 0.5ARated voltage: DC100VRated power: 10WContact type: NC (normally closed)Fixing method: underground or surface installationConnection method: wire 550mmMaterial: Zinc AlloyColor: SilverBrand name: BQLZRSize: 105x37x10mm/4.13 inchx1.46 inchx0.39 inch (LxWxH)Cable Length: 370mm/14.57 inchMagnet: 106.5x16x15mm/4.19 inchx0.63 inchx0.59 inch (LxWxH)Hole Spacing: 89mm/3.5 inchWeight: 174 gPackage include:1 x Set Magnetic Reed Switch4 x Screws Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin