【Instant Protection, Powerful Deterrence】 This wireless ring alarm equipped with a highly sensitive magnetic sensor, the alarm instantly triggers a powerful 120-decibel alert the moment intruders attempt to pry open doors or windows (or separate the main and auxiliary components). This effectively deters intruders, reliably safeguarding your home. 【Compact Wireless, Portable and User-Friendly】This door and window alarm miniature wireless design takes up minimal space, fitting easily into a rucksack for on-the-go security. (If not triggered, check switch mode or battery level.) 【Simple Installation, Stick and Use】The window door alarm features self-adhesive mounting requiring no screws or wiring. Clean the surface and apply the included adhesive pad for installation. Insert two AA batteries (not included) to swiftly deploy security across doors, windows, cupboards, drawers, and more. 【Protecting Loved Ones, Preventing Accidents】Effectively prevents children from accessing cupboards, swimming pools, or hazardous materials. Also ideal for monitoring elderly family members or preventing sleepwalkers from leaving their beds unattended, adding an extra layer of safety for your household. 【Versatile Applications】Beyond door and window monitoring, Door alarm sensor secures swimming pools, garages, sliding doors, and storage areas. Also functions as an alert for refrigerator or wine cabinet openings, suitable for homes, flats, dormitories, offices, and retail premises., Manufacturer: Koprek