Heath Zenith Wireless Kit with Two Socket Receivers and PIR Motion Detector, White #RH-6026-WH-A Wireless kit with two socket receivers and PIR motion detector For indoor and outdoor use Easy to install: receivers mount directly to standard medium-based light socket Motion sensitivity and on-time adjustable; detects motion in 180-degree arc Sockets 3.75 by 4.5 by 1.125 inches each; motion detector 3.875 by 3.125 by 3.875 inches