Ajax 133223.02.BL1 is a wireless combined passive infrared and microwave motion detector from the S-Line series in black, running on the Ajax 868 MHz two-way radio protocol. Detection reach is 12 m over an 88.5 degree field with pet immunity up to 20 kg at 50 cm distance, and the housing is designed for surface mounting at 2.2 to 2.4 m height. The 110 x 65 x 50 mm unit runs on 3 V and requires no cover-tamper wiring. Typical application is intrusion detection in domestic and small-commercial zones where pets must not trigger alarms.