Sold as 1 Each. Color forecast icons: sunny, partly sunny, cloudy, rainy, stormy, & snowy. Heat index & dew point. Transmission Range: Over 300 Ft. Atomic self setting time date with automatic Daylight saving time resets. Adjustable backlight (HI-LOW-OFF). 3 AAA battery operated (not included) or 5.0V AC Adapter is optional (included). Monitors Indoor and Wireless Outdoor temperature (F or C) and humidity (%RH) with MIN and MAX records. 12 or 24 hour time display. Wireless Outdoor Sensor requires 2 AA batteries (not included). Indicates Temperature alerts (IN OUT) and Trends for both temperature humidity. Time alarm with 10minute snooze.