How does the door window alarm sensor work?
The sensor functions as two separate pieces that are fitted to the side of a door or window.
When the 2 pieces lose contact with each other or are disturbed,
then the alarm chimes, help secure your home at each entry point.

Extremely loud 120 DB alarm helps wake/alert homeowner or renter,
helps deter intruder and possibly notifies neighbors, audible up to 750 feet (230 m) away

NOTE:
1. The distance between 2 parts should be less than 10mm
2. In order to ensure double-sided adhesive effect,
Please cleaning door window surface dust
before attaching the double-sided tape.
3. The battery is not permanently used, please replace it when there is no power.

FEATURES:
1. Simple and convenient to install, requires no wiring
2. Easily mounted by double-side adhesive
3. Includes 3 pcs button batteries(LR44) for each alarm
4. Size: 2.9″ x 1.5″ x 0.4″
5. Low battery test light check battery life easily
6. We ensure the quality of the products.
Please send us an email with any questions.
We will give you a satisfactory answer.

Product Features

• EASY INSTALLATION: The two-piece magnetic design is easy to install, no wiring or screws needed, just simply tear the tape, paste it and 3 x LR44 batteries included.
• USER-FRIENDLY: 2 adjustable settings (off/alarm); chime mode is ideal to alert you . System components are simple enough for anyone to use, The siren alarm will be triggered immediately once the two parts are separated.
• 120 DB SECURITY REMINDER: The 120-decibel alarms safety chime are loud enough, great for child/old people safety, deterring intruders and alerting residence, sounds alarm when door or window opens.
• USEFUL IN VARIOUS PLACES: Portable wireless door window alarm sensor will be a perfect choice for your family, bedrooms, cabinets, safes, hotels, garage, apartments , dorm rooms, shop, office, sliding glass door.
• BATTERY INDICATION FUNCTION: The 5-Pack wireless home door window entry security alarm sensor will keep flashing light when the battery is low, easily to replace the batteries and keep home security.