LACORAMO Door Chime 130db Wireless Alarm Sensor,2 Remote Controls,Door Entry Burglar Alert Security System for Home…
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LOUD ENOUGH: You will immediately hear the warning that the door is open when magnetic sensor separated by more than 0.6 inches, whether you are at home or in a yard 750 feet from your house. No false positive, no mess alarm.
LOW BATTERY REMINDER: The sensor alarm can standby a year, no need to replace the batteries frequently. When the alarm batteries (included 2 AAA batteries ) voltage is lower than 2.1V, there will emit beep sound. Don’s worry about failing to work.$17.99