Personal Security Window/Door, DIY Protection, Burglar Alert, Wireless Chime/Alarm, Easy Installation, Ideal for Home, Garage, Apartment, Dorm, RV and Office, White Specification: Material: plastic + electronic components Size: 6.2*3*2cm color: White Feature: ✔Includes one window/door alarms, each with three adjustable settings off/chime/alarm ✔Loud 90-decible alarm sounds when door or window opens, helps deter intruder and alert residence ✔Easy and convenient to install, requires no wiring, mounting hardware and instructions included, designed for indoor use only ✔Built-in low battery test button to easily check battery life Package Includes: 1pc * window alarm Note: 1. Manual measurement of the size may have a certain error (within ± 1cm), the actual size shall prevail in kind. 2. Due to different light and shooting conditions, the picture color may differ from the actual product. Please refer to the actual product. Brand new and high quality. Super environmental adaptability and stability. Easily install on windows or doors through adhesives. Suitable for families, apartments, mobile homes, offices, hotel rooms, garages, etc. Super loud 90-decibel alarm sound. When someone opens doors and windows illegally (the relative position of the primary and secondary components changes), the alarm can emit a strong alarm sound to warn the intruder to leave and remind the owner. Magnetic sensor switch. To scare off intruders, when the siren is triggered, the siren will sound until the door is closed. When an intruder breaks in, the alarm will emit a clear and loud sound. Suitable for window or door warning. Tip: The insulating sheet of the battery box must be pulled out before use.