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which can give more convenience for your life
otherwise it will cause the bell does not ring or the volume is too small
heat resistant
39inchPlease allow 1-2cm error due to manual measurement
Please allow 1-5mm error due to manual measurement
Wireless Entry Home Door Window Burglar Alarm Safety Security Alarm System which can give more convenienceWireless Entry Home Door Window Burglar Alarm Safety Security Alarm System Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes,apartments,mobile homes,offices,hotel rooms,garages,and more Magnetic sensor switch detects your door or window. Super loud 95 dB alarm. When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can issue a strong alarm, warning