5pcs Recessed Door Window Contact Sensor Magnetic Reed Alarm Black

Goods Descriptionalarm magnetic reed etc.door alarms for home security, This item are 5pcs plastic reed which are operated by an applied magnetic field.window alarm sensors NOTE：This product is not suitable for .window door sensors Easy to install and use.door alarms when opened It is designed for use with alarm systems, great for use in family and factory window, doorPackage List5 x alarmsCharacteristics-Material: Plastic + magnetic items-Size: 2.3x1.9x1cm/0.9x0.75x0.39in-Color: Black- Magnetic operated by an applied magnetic field window alarm sensors.- Designed for use with alarm systems door alarms.- Circuit is connected when magnet is closed magnetic door .- Easy to install, easy to use magnetic safety door closing system.-Product Info:Door and window contact sensor- contacts, very practical and useful magnetic door closing system.-Note: Normally closed signal (conducting when merging, disconnecting when opening the door, connecting the alarm host.) embedded magnets

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