SF19 English cross-border simple door magnetic alarm, battery version, used for doorbell, refrigerator, door and window closing reminder, anti-theft

• HIGH SENSITIVITY: Magnetic 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 . • 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. • SUPPORT MULTIPLE MODES: The door window open alarm is designed with general alarm, constant alarm, door close alarm, doorbell mode, close or disarm. • EASY TO INSTALL AND OPERATE: window alarm sensor can be easily installed on or doors with double sided tape, no tools required. • DOOR ALARM: The door magnetic sensor is ideal entry warnings for homes, apartments, mobile homes, offices, hotel rooms, garages and more.