Ambient Weather WS-01PF Color Changing Wireless Pool and Spa Temperature Night Light with Ambient Backlight, White Nullify Imported The colorful WS-01PF night light featuring ambient backlighting is easy to read from any distance. Finally, an easy way to read your water temperature from both indoors and outdoors The bright LED backlight color changes with the indoor or pool and spa temperature, providing instant Feedback on whether a room is too hot or too cold, or the pool outside is comfortable Perfect for identifying hot and cold spots in your home or facility at a glance. Keep an eye on the pool and spa outside from the comfort of any room in your house Plug into your AC wall outlet, and light your way with Ambient Weather Informative ambient back light displays The Intelligent night light consumers very little power, and features an electronic eye with auto Dim feature