The One and Only, 6 in One BUS Sensor ceilng mount unit. It has PIR, Lightintensity Lux sensor, Infra Red Receiver from hand held remotes, It Have 6 IR 360 Degrees Transmitters, It has 2 Auxiliary Security Zones Inputs with built in Logic control and timers. Fully Energy Saving and Green Building Supporting Product by Smart-HDL. www.sbuspro.com www.smarthdl.com