The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply. The circuit employs the functions of reed switches to produce a gate alarm ...
The YL-333 Magnetic Antitheft Alarm is an easy to install security alarm system for doors and windows. This battery-operated device works on the principle of magnetic proximity detection. It can ...
As a flight attendant, CiCi frequently stays in hotel rooms alone. To feel safer, she packs a door lock and door alarm. These tools help, but she always encourages travelers to listen to their gut.
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