This is the Starline ST-PIR360 Wireless Motion Sensor with Starline MS-06BT built-in, for use with the Starline E9 system.
360 degree PIR wireless movement sensor with StarLine MS-06BT on board. For campers, motorhomes, garages and other rooms. Can be programmed to all S-, E- AS-, B- series alarms, by Bluetooth. Works powered from CR123 3V Lithium battery.