5pcs Recessed Door Contact Sensor Magnetic Reed Device

Features-Size: 2.3x1.9x1cm/0.9x0.75x0.39in-Material: Plastic + magnetic items-Color: Black- Circuit is connected when magnet is closed Window Alarm .- Magnetic operated by an applied magnetic field upgraded portable door lock stop alarm.- Designed for use with alarm systems window sensors security.- contacts, very practical and useful door handle vibration alarm.- Easy to install, easy to use magnetic door closing system.-Note: Normally closed signal (conducting when merging, disconnecting when opening the door, connecting the alarm host.) travel door alarm-Product Info:Door and window contact sensorGoods Descriptionmagnetic door closing system etc.alarm magnetic reed NOTE：This product is not suitable for .door window sensors reed Easy to install and use.door opening alarm It is designed for use with alarm systems, great for use in family and factory window, door.electrical equipment This item are 5pcs plastic reed which are operated by an applied magnetic fieldPackage Include5 x alarms

• Magnetic safety door closing system:fits your needs and alert you of your home security,window door sensors
• Door window sensors reed :magnetic operated by an applied magnetic field,Recessed Door Contact
• Door access control:circuit is connected when magnet is closed,alarm magnetic reed
• Garage door alarm:this contacts works with any access control or alarm system available,sliding door alarm
• Security door :the product designed great for use in family and factory window, door etc​,electrical contacts for doors