Feature: 1. HIGH SENSITIVITY: Magnetic sensor switch detects your door or window. The alarm sounds when the window or door is opened. High sensitivity promptly alerts you to the condition of your doors and windows. 2. ULTRA HIGH 108 DECIBEL ALARM: Supports 108db alarm, when someone illegally opens a door or window, the alarm can sound a strong alarm to warn the intruder to leave and alert the homeowner. 3. SUPPORT MULTIPLE MODES: The door window open alarm is designed with general alarm, constant alarm, door close alarm, doorbell mode, close or disarm. 4. EASY TO INSTALL AND OPERATE: window alarm sensor can be easily installed on windows or doors with double sided tape, no tools required. 5. DOOR ALARM: The door magnetic sensor is ideal entry warnings for homes, apartments, mobile homes, offices, hotel rooms, garages and more. Specification: Item Type: Door Window Alarm Material: ABS Alarm Volume: 108 DB Battery Life: Standby Time Over 2 Years (Based On 5 Switches Per Day) Alarm Batteries: AAA x 2 (Not Included) Operating Ambient Temperature: -10℃ To +60℃ Operating Ambient Humidity: R/H <80% Storage Temperature: -20℃ To +70℃. Package List: 1 x Door Window Alarm1 x Magnetic Components3 x Double Sided Adhesive1 x Instruction Manuals