Wireless Home Alarm Door and Window Alarm 4 Modes Wireless Magnetic Sensor for Home Security System Child Safety (2 Pack) <p>Door and Window Contact Sensor: This magnetic door and window alarm will emit a 110dB loudness bell when the door is opened. It can prevent your children from sneaking out. And it is a perfect anti-theft wireless security magnetic alarm for child safety, home security, garage security, mailbox security and business security</p> <p>4 Alarm Modes: It has 4 alarm modes: #1 Ordinary Alarm Mode (the alarm will ring for 1 minute if the door is opened); #2 Wireless Doorbell Mode (“Ding dong”, rings once as a welcome tone); #3 Alarm and Stop Mode (rings loudly if the door is opened, and it will stop as soon as your door is closed); #4 Door Close Reminder Mode ("Di Di"), from bottom to top, it will remind you with a repeated sound until the door is closed)</p> <p>Easy to Install: This home/window alarm security kit comes with self-adhesive pads, so no tools are needed, just stick the sensor and alarm on the door or window. It can also be used as a door stop alarm, pool door alarm, garage door alarm or sliding door alarm</p> <p>Auto & Fast Switch: With an ultra-sensitive magnetic sensor, this alarm kit can quickly detect if your door or window are open. Powered by 2 AAA batteries (not included)</p> <p>Stop burglars the moment they try to enter your home. Equip each window and door with a door sensor.</p> <p>This door and window alarm provides a simple solution to protect your home from invasions thanks to the 110 dB alarms, it is also perfect for preventing your children from opening doors they shouldn't and keeping your children safe.</p> <p>door alarm</p> <p>System Working Principle</p> <p>Alarm triggered by magnetic wireless sensor</p> <p>You can set the door and window detectors to one of the 4 modes you want and change it indefinitely whenever you want.</p> <p>Easily mounted on the window or door with double-sided adhesive tape. No wiring required! No screws required</p> <p>Stick the double-sided tape on the back of the alarm and the magnetic strip.</p> <p>Wipe the corresponding position of the door/window, stick and fix the alarm, and then press hard.</p> <p>Test the alarm. Activate the alarm, open and close the door or window to check if the alarm works properly.</p> <p>Dimension: 30 mm x 18 mm x 100 mm</p> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.