mFi, Ceiling Mount Motion Sensor

Ceiling Mount Motion Sensor (mFi-MSC) is a dual-technology motion sensor, using both passive infrared and microwave motion sensors to minimize the likelihood of false detections. It is wall-mountable and designed for security, occupancy detection, resource scheduling, and other smart building applications. 

For use with mFi mPort hardware and mFi Controller software (included with the mFi mPort). 

Connection Type: mFi RJ45 
Sensors: Dual Technologies – Passive Infrared and Microwave 

http://dl.ubnt.com/datasheets/mfi/mFi_Datasheet_V10_6-28-12.pdf

http://dl.ubnt.com/guides/mfi/mFi_MSC_QSG_V10_4-24-12.pdf