It s a thin magnetic sensor that chimes when a door or window opens or closes.
Sensitive door window sensor.
Surface mount door contacts for commercial or metal door water resistant outdoor.
The link interactive door and window sensor attaches to doors windows cabinets and shed doors so you always know when someone s opening or closing them.
Alarm sensors door window switch.
3pcs rc 33 no recessed wired door contact sensor alarm magnetic reed switch.
Door alarm system home security diy kit 4 zones 125db 2 in 1 host expandable 40 door window motion sensors password required burglar alert security system one button remote 4 2 out of 5 stars 106 37 99 37.
2 pack generic 2gig dw10 345 thin door window sensor 2gig vivint honeywell.
Link interactive s sensors are easy to install and work best with the link interactive home security system.
Strips uses a magnetic sensor to sense if a window door is opened or closed.
With strips in every window and door you get full perimeter protection.
Best homekit door and window sensors imore 2020.