When the two parts of the door chime sensor are separated more than 1.2 inch, door sensor will be triggered, then you will hear the ringtone from the receiver. You will hear the doorbell ring when someone opening your door/window or your pet coming home, which can help deter break-ins, keep your children and pet safe, and never miss a customer when they come. It is ideal door alarms for home, office, store, warehouse, garages, and more! They are in small size and can be installed or placed at any indoor position to provide you with a door entry chime/alert system.

Product Features

• 【Take Care Of Your Family And Business】When the two parts of the door chime sensor are separated more than 1.2 inch, door sensor will be triggered, then you will hear the ringtone from the receiver. You will hear the doorbell ring when someone opening your door/window or your pet coming home, which can help deter break-ins, keep your children and pet safe, and never miss a customer when they come. It is ideal door alarms for home, office, store, warehouse, garages, and more!
• 【150% Increased Operating Range】Contrary to most other wireless door alarm devices on the market, which have a maximum operating distance of only 200-350 feet in open space, this wireless door alarm can boast an amazing range of 656ft (200m) in open space.
• 【Expandable& LED Visual Alerts】 Each receiver can be paired with up to 50 sensor. Each sensor can be paired with up to 50 receivers. When the door chime receiver and sensor signal engage, the LED indicator flashes to perform a visual alter. Great visual indicator for you when listening to music or for the hearing impaired.
• 【52 Melodies with 4-Level of Adjustable Volume】The wireless doorbell alarm offers a wide selection of 52 chimes for your personal taste, including common ringtone, pleasant tunes and more. 4 levels of adjustable volume from 25db – 110db.
• 【Easy to Install】Requires no wiring, just plug the door entry alarm receiver into any standard outlet, please take out the battery insulating strip in the wireless doorbell sensor before use, then install the door sensor onto the door or window with provided double-side tape or screw (the installation gap between 2 parts must < 1.2 inch)