Suitable for wooden/glass/plastic material doors | For home burglar alarm system, important kits of home security. | Screws terminal connection inside , easy for mounting and connecting to systems. | Surface mounted with double side tape , ≥ 15mm operation gap | NC type , normally closed : Switching OFF when door is opened
With double side tape, easy for installation | Suitable for 22-28 AWG wirs | Reliable quality with white case | Normally closed type(NC), switch closed when door is closed. | more than 1/2 inch operation distance , suitable for most door&windows