Heath Zenith RH-6019-WH-A Wireless Kit with Plug-In Alert and PIR Motion Sensor, White Wireless kit with plug-in alert and PIR motion sensor For outdoor and indoor use Plug in turns on light and sounds alert when motion is detected Sensor may be mounted where needed with no wiring White; motion sensor 3.875 by 3.125 by 3.875, plug-in 2.875 by 3.50 by 1.125 inches