Features: 1.120DB ALARM SOUND: Wireless door alarm will sound a high pitched alarm up to 120dB upon detecting a vibration, scaring away burglars or intruders. 2.STRONG ALARM: When someone illegally opens a door or window, the alarm can sound a strong alarm to warn the intruder away and alert the homeowner. 3.EASY TO INSTALL: Wireless vibration alarm is easy to install, just suspend it on a doorknob, behind a door, in a lock position, or on a window. 4.EASY TO CARRY: Security door alarm instantly detects any movement inside a door or window. Lightweight and mini, easy to carry. 5.SCOPE OF APPLICATION: Window alarm sensor is suitable for home, apartment, mobile home, hotel room, garage, etc. to protect your safety. specification:Item Type: Security Door Alarm Material: ABS Alarm Volume: 120 DB Battery: 1 x 9V Battery (Not Included) PackageList:1 x SecurityDoorAlarm