SRMAN Door Opening Sensor Wireless Time Delay Door Alarm Door Sensor Door and Window Security Alarm Home Security
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Product description
- 2. Batteried by 2pcs AAA batteries ( not included ).
- 1. 4 in 1 Multi-Function --- General Alarm, Constant Alarm, Closing-door Alert (Time Delay), Doorbell
- 3. Self-Adhesive, easy to install and operate.
- 4. 108 dB Loud Alarm can effectively prevent intruder entering through your door window.
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