Wiring Device-Kellems, ATU1000CRP, Ceiling Mount Occupancy Sensor With Photocell and Isolated Relay, Adaptive Dual Technology, 24 V DC, 33 mA, Ultrasonic Sensor, 1000 sq-ft Coverage, 180 deg Viewing, 8 to 40 min Adaptive, 8 sec Test Time Delay, LED Lamp, Ceiling Mounting, 32 to 104 deg F, ABS, Off-White, 1-1/2 in H x 4-1/2 in D Dimensions