Ambient Weather WS-8600 Weather Station Clock with 256 Color Changing Wireless Temperature Humidity, and Barometer Display (Black) The stunning and stylish WS-8600 weather alarm clock featuring high contrast Ambient backlighting is brilliant, and easy to read from any angle or distance. The elegant display features time, indoor and outdoor temperature, barometric pressure, daily highs and lows, historical data over 72 hours, and a detailed barograph for viewing trends. The WS-8600 includes one TX-8340 Thermo-Hygrometer Wireless Sensor wireless for measuring outdoor temperature, or wherever temperature is important, and supports up to 3 remote sensors. The Ambient Color changing backlighting can be manually set to any of 256 colors, or automatically change colors based on the outdoor temperature. Note: The display is powered from an AC adapter, and includes back up batteries, but must be plugged into AC power to continuously view the back light.