This slim wireless door & window sensor is ideal for door and window applications and features Ness's industry leading two-way technology.

• Compatible with Ness-M1XRFTWM two-way wireless transceivers, (Part No 101-292)
• One built-in reed switch,
• Front and back tamper option

The low profile body of the reed switch and supplied magnet allows for unobtrusive installation on door and window frames in cases where wired reed switches cannot be used.

With the Two Way Wireless (TWR) technology the switches status LED will indicate when the signal is recevived by the transceiver.