Hollarm Door Opening Sensor Wireless Time Delay Door Alarm Anti-theft Door Window Security Alarm Refrigerator Alarm Door Sensor

Product Feature:

 1. Product Size: 3.4*1.7*0.6 inch.

 2. 4 in 1 Multi-Function — General Alarm, Constant Alarm, Closing-door Alert (Time Delay), Doorbell.

 3. Batteried by 2pcs AAA batteries ( not included ).

 4. Self-Adhesive, easy to install and operate.

 5. 108 dB Loud Alarm can effectively prevent intruder entering through your door/window.

4 In 1 Multi-Function:

 1. General alarm mode It alarms when doors/windows are open; Stops when they are closed.

 2. Constant Alarm Mode It alarms at least 30 seconds when triggered.

 3. Time Delay Mode It sounds "di-di-di" when doors/windows opened 15 seconds later (Can set the delay time         3/15/30/60 seconds, the factory default is 15s). This is perfect for freezers or refrigerators.

Doorbell Mode:

It sounds "Dingdong" when doors/windows are open.

Package Including:

1* Door/window Alarm;

1* Magnetic Stripe Double Sided Sticker User Manual.