Description: 【130 dB Loud Alarm】: This window door alarm has 130 dB Loud Alarm, When someone opens the door or window illegally, the alarm can issue a strong alarm, warning the intruder to leave and remind the owner. 【4 Alarm Modes】: This door and window alarm with 4 alarm modes, suitable for various scenarios, with suspended icon display, the alarm mode is clear at a glance. 【Easy to Operate】: Magnetic door and window alarm, Magnetic sensor switch detects your door or window, easy stick installation and operation, press on off switch to power on off. 【Easy Installation】: Door Security Alarm, No wiring needed, no screws needed, easily mounted by adhesive, just sticks it on the window or door then all is done, with Low battery reminder function 【Widely used】 Home security alarm system, Perfect for home, office, store, garage, dorm room, apartment or even RV. Specification: Material: ABS plastic Host: 90mmx42mmx15.5mm/3.54inchx1.65inchx0.61inch Magnetic Sensor: 45.2mmx13mmx12mm Powered: 2Pcs AAA Batteries(Not Included) Package Includes: 1Pcs Door Window Alarm 1Pcs Magnetic Sensor