Dimensions: Receiver: 9" x 4.6" x 1.25" Wind Chill (°F or °C) Records MIN & MAX Wind Chill with Time and Date Stamp Wind Speed Displayed in Beaufort Scale Bar Graph Records MAX Wind Speed and Gust with Time and Date Stamp Barometric Pressure Tendency Arrow Forecast Icon Based on Changing Barometric Pressure Dew Point (°F or °C) Records MIN & MAX Dew Point with Time and Date Stamp Wireless Outdoor and Indoor Humidity (%RH) Records MIN & MAX Humidity with Time and Date Stamp Indoor Comfort Level Icon Wireless Outdoor and Indoor Temperature (°F or °C) Records MIN & MAX Temperature with Time and Date Stamp Moon Phase Atomic Time and Date with Manual Setting Automatically Updates for Daylight Saving Time (On/Off Option) 12 or 24 Hour Time Display Perpetual Calendar Time Zone Setting US Time Zone Map Time Alarm with Adjustable Snooze LED Backlight Wall Hanging or Free Standing Wind Speed Range: 0 to 111.8 mph Wind Chill Range: -21.8 to 157.8°F Wireless Outdoor Humidity Range : 1% to 99% Indoor Humidity Range : 1% to 99% Wireless Outdoor Temperature Range : -21.8 to 157.8°F Indoor Temperature Range : 14.2 to 139.8°F Transmission Range : Up to 330 Feet Transmission Frequency : 433.92 MHz Power Requirements: Receiver: 3 "AA" alkaline Batteries Sensor: 2 "AA" Alkaline Batteries