Oregon Scientific EW91 Wireless Indoor/Outdoor Thermometer with Ice Alert Displays indoor and outdoor temperature Ice alert function: lcd icon display and led light blinks when outdoor temperature nears icy conditions Wirelessly transmits sensor data from 100-feet away Displays indoor and outdoor temperature Ice alert function: lcd icon display and led light blinks when outdoor temperature nears icy conditions Wirelessly transmits sensor data from 100-feet away LED backlight Multi-functional weather station