This XT-W is the standard PIR in the Premier Elite range.
There are two other sensors in this range with the same style.
Texecom DT-W Wireless Dual Tech PIR Detector GBF-0001
Texecom QD-W Wireless Quad PIR Detector GBD-0001
Texecom RICOCHET, these wireless devices receive and repeat wireless transmissions from other devices. The size, scalability and range of the entire system are extended as wireless signalling is no longer limited by point-to-point communications.
The Premier XT-W features Ricochet Mesh Technology and pet immunity.Ricochet enabled wireless devices receive and repeat wireless transmissions from other devices. The size, scalability and range are extended, as wireless signaling is no longer limited by point-to-point

The Texecom Ricochet Premier Elite XT-W is a digital PIR detector for the Ricochet range that takes commercial wireless detection to the next level.

By combining commercial-grade motion detection with Ricochet mesh technology in a range of cost-effective devices, the Ricochet XT-W series offers unprecedented performance for mass-market applications.

The Premier Elite XT-W has Sealed Optics which prevents dust and insects from entering the sensor optics. it also has Digital temperature compensation both features eliminating potential false alarms.

The new Ricochet wireless digital PIR has Auto Learn Function so the device automatically learns onto the system once battery is inserted for quick and simple installation.