Highlights:Dimensions:• Clock: 11" L x 1.1" W x 8.54" H• Sensor: 2.5" L x 1.42" W x 3.98" H Wireless outdoor temperature (°F or °C) with trend arrowMonitors indoor temperature (°F or °C) with trend arrowAtomic time and date with manual settingAutomatically updates for Daylight Saving Time (on/off option)Time display (hour / minute)Perpetual calendar (month / date / weekday)Time zones: Time zones:• Atlantic Time (AST)• Eastern Time (EST)• Central Time (CST)• Mountain Time (MST)• Pacific Time (PST)• Alaskan Time (AKT)• Hawaiian Time (HAT)Time alarm with snoozeWall hanging or free standingLow battery icon for clock and sensorSpecifications:Wireless outdoor temperature range: -40 °F to 140 °F (-40°C to 60°C)Alkaline Batteries: -20°F to 140°F (-28.8°C to 60°C)Lithium Batteries: -40°F to 140°F (-40°C to 60°C)Temperatures below - 20°F (-28.8°C) require Lithium batteries in the outdoor sensor.2 "AA" Alkaline batteries (not included)Battery life 24 monthsIndoor temperature range: +32°F to +122°F (0°C to 50°C)2 "AA" Alkaline batteries (not included)Battery life 12 months