Features: 1.Easy to Install and Operate: Door and window anti theft alarms are easy to install with adhesive. It can be easily installed on windows or doors through double sided tape, without tools. 2.Magnetic Trigger: Magnetic sensor switches can detect your doors and windows. When a window or door is opened, an alarm sounds, and a loud alarm helps prevent intruders and may notify neighbors and homeowners. 3.Widely Applicable: Door and window anti theft alarms are ideal entry warnings, suitable for homes, apartments, mobile homes, offices, hotel rooms, garages, etc. 4.Ultra High 105 Decibel Alarm: The door and window anti theft alarm supports a 105 ultra high decibel alarm. When someone illegally opens the door and window, the alarm can emit a strong alarm, warning the intruder to leave and reminding the owner. 5.Low Power Standby: The door alarm will be in a low power standby state when no alarm sound is triggered to reduce power consumption and provide an extended battery life. specification:Item Type:Magnetic Sensor Door Alarm Alarm Volume: 105 dB Battery: 3 1.5V LR44 button batteries 345mAh (included) PackageList:1 x MagneticSensorDoorAlarm 1 x Magnetic Component