Honeywell TE852W Weather Forecaster with Wind Speed and Atomic Clock reads indoor and outdoor weather temperature, indoor and outdoor humidity (range 30 to 80%), wind speed, wind chill, and has a programmable ice warning alarm. Honeywell TE852W digital thermometer/weather station features a 100 foot range from sensors to the main display and records and charts 24 hour barometric pressure history. With enhanced blue backlight LCD display the clock on the Honeywell Weather Forecaster TE852W w/ Wind Speed automatically sets itself to the US Atomic Clock. This Digital Weather Forecaster provides a 12 to 24 hour weather forecast and records minimum and maximum indoor and outdoor temperature and humidity in memory. This unit is fully expandable to monitor the weather temperature and humidity in up to five separate locations with the addition of up to four additional model TS33C sensors, sold separately. Features a user-friendly sunrise and sunset calendar, high wind and gust alarms, user programmable altitude adjustment, remote channel auto-scan, and comfort level indicator. Requires 6 AA alkaline batteries for the main unit, batteries not included. In addition to Weather Instruments, make sure to check other Honeywell Weather Instruments and other Honeywell products offered in our store.