Dry Contact Output N.C. (door closed) contact opens when the magnet moves away.

Compatible with all alarms brands

Size: 

105x38x10mm detector

105x15x15mm magnet

Dry contact 

N C : when magnet near the switch,  (two parts are next or touch each other),circuit is closed

Suit for alarm system 

Cord Length: approx.45cm/ 17.7"

cable protector :39cm

Weight: 143g

Distance:50- 60 mm