Features: The shell is made of high quality ABS plastic with matte finish and high-end atmosphere. The components are processed by 5M chip to avoid the conceal danger of manual welding. 130db super loud sound, effectively frighten the thieves. Circuit optimization and low-consumption design, the board will not be burnt, which makes it work for a long time, Adopt powerful magnet, the magnetic force is strong and never degaussing. It will alarm with loud sound when the sensor detects someone come in which can warn you and scare burglar away. Specification: Housing Material: ABS Color: White Power Supply: DC 9V Battery(Not Included) Alarm Volume: ≥120DB Package Weight: approx.56g Application: sliding doors, courtyard doors, anti-theft doors and windows Package list: 1 * Magnetic Door Alarm(Battery Not Included) 2 * Sticker 1、The shell is made of high quality ABS plastic with matte finish and high-end atmosphere. 2、The components are processed by 5M chip to avoid the conceal danger of manual welding. 3、130db super loud sound, effectively frighten the thieves. 4、Circuit optimization and low-consumption design, the board will not be burnt, which makes it work for a long time, Adopt powerful magnet, the magnetic force is strong and never degaussing. 5、It will alarm with loud sound when the sensor detects someone come in which can warn you and scare burglar away.