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 Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!