Hệ thống báo động chống trộm gắn cửa không dây

Item specifics Name: Wireless alarm Material: ABS. Voltage: 3V Color: White Model: JD-188 Alarm voice: 90db Power supply: 2×AA battery（not included） Features: 100% brand new and high quality. Super loud 90 dB alarm. Convenience in installation--just peel and stick. Super environmental suitability and stability. Dustproof and insect prevention. Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes, apartments, mobile homes, do rms, offices, hotel rooms, garages, and more! Magnetic sensor switch detects entry protecting your home or office whether you are in or out. Warning door / window sticker is supplied free in package. When the distance between two door magnets is over 2cm,it will issued a treble warning sound. Usage: This product is easy to install, and you can simply paste the main accessory on the door and door frame, or two Windows, and align (between 0.5 and 1.5 cm). When someone opens the door or window illegally (the relative position of the main accessory changes), the alarm can be issued with a strong alarm, warning the intruder to leave. When you want to open the door, the window can be controlled by the switch. It is suitable for burglar, such as residential, office and shop counters.