Wireless magnetic sensor for the Duo line.

Dispens the use of wiring, speeding up the installation.
It transmits opening and closing information for the alarm center, that is, the center is not armed until it receives information that all doors and windows e.g. of residence, company, etc. are properly closed.
That generates even more security for the entire alarm system.
More security in wireless communication.
Frequency of 868MHz.
Range of 100m without obstacles.
It uses 2 AAA 1,5V batteries not included.