Home Security Magnetic Sensor Alarm System (10 pcs pack)

Guard your home with this home security alarm system! Designed with a built-in magnetic sensor, the system will detect the opening of a door or window and will sound a loud 90 dB alarm once triggered by a 0.5" gap.  Installation is easy and tool-free. Just stick the main receiver and transmitter to both sides of your door or window using the included (on the item) double-sided tape. Switch it ON and, once a gap of 0.5" between the components is detected, you will be alerted so you and your property remain safe!  *Super-Savings pack comes with 10 units for complete home protection! --- Guard your home whether you're in or out! Install it on your doors or windows to deter unwanted home intruders, or on gun closets or medicine cabinets to keep your kids out.With a compact and wireless design, it's small enough to take on business trips and vacations so you can stay protected anywhere you go. Each unit comes with 3x LR44 button cell batteries for wireless portability.SPECIFICATIONS: Pack