Jenix Wireless Door Window Security Burglar 105 Decibel High Alarm with Magnetic Sensor, Door and Window Sensor Anti Theft System for Home Office Door (Set of 4)

Wireless Door & Window Security Alarm – Set of 4 is a compact magnetic sensor alarm designed to protect homes, offices, shops, apartments, garages and other entry points. When the protected door or window is opened, the magnetic contact separates and instantly activates a loud 105dB siren, helping deter intruders and alert nearby occupants.

The alarm installs easily using the supplied double-sided adhesive, with no drilling or wiring required. Each unit operates on 3 × LR44 button cells and offers long standby life. Simple ON/OFF operation makes it ideal for everyday DIY security use.