The Bosch DS150i is a gray, request-to-exit PIR detector that signals an access control system or door control whenever motion is detected.The detector boasts a wrap-around coverage pattern and can be mounted on a wall or ceiling. The device includes an activation LED for visual status alerts. Also known as -DS150i Motion Sensor-Bosch DS150i Motion Sensor - 10 ft Operating Range - Light Gray-DS150ITP160 Bosch Security Systems Inc Ds150i With Tp160 Plate-Detection Systems/Bosch Sec REQUEST TO EXIT PIR - GREY - DS-DS150I-Bosch DS150i Motion Sensor