Security System for Your Home - 120 DB Siren alarm not only can cause huge shock to thieves, but also wake you up from sleep to prevent horrible accident. A door and window alarm with wide applications, forced entry warning, ideal for home, office, hotel, apartments, garages, dorm room, or even RV. Keep Your Children Safe - This magnetic wireless sensor door and window alarm is powerful enough to detect entry, it lets you know when your children open the doors or windows to prevent children and babies from going out, whether you are inside or outside the house. (audible distance up to 750 ft / 230 m). Especially, if you have a swimming pool at home, it is very necessary to install a door alarm. Smart Design and Easy to Use - Size: 6.4x4.25x1.7cm, door and window alarm with smart size, alarm sound: 120 dB, unique ultra-slim door and window alarm, design with 3 adjustable settings (on / off / set). Alarm Triggered by Magnetic Wireless Sensor: Alarm Triggered after Entrance Door or Window Open. Easy to Install with Double Sided Adhesive Tape - Easily mounted on window or door with the tape. No wiring needed No screws needed You can install this alarm on all windows and doors, drawers, doors and other plates. Number of shipments: 4 pieces (without battery)