I personally use these & not only for crime prevention! I have an adventurous toddler & lounge room windows that are easily accessible without climbing, I have flatly refused to open them once she learnt to walk, picturing a very real catastrophe occurring if she was to lean against the screen a little to much..Now i attach these to the top of the window frame & can open it enough for some breeze & if the window was to be lifted or closed by .5mm, the alarm would ring out & id be notified immediately
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 tape to window or door
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
Ideal entry warning for homes, apartments, mobile homes, do rms, offices, hotel rooms, garages, and more
Specifications:
Size:approx. 6.3*3.1*2cm
Color:White