Full featured Atomic Digital Wall Clock. Clock has 12 hour time display and perpetual calendar showing the date. With the Atomic functionality this clock automatically updates for Daylight Savings Time and always displays the current time! Clock also show Moon Phase, has Time Zone Setting, a Time Alarm with Snooze, and has 4 languages to choose from: English, French, German, and Spanish. Clock can be Wall Hanging or Free Standing and boasts a Swiss Precision Sensor. Dimensions: 9.76" Height x 10.53" Width x 1.18" Depth Runs on 3 "AA" Batteries Sensor for Outdoor Temperature Dimensions: 5.5" x 1.6" x 1" Runs on 2 "AA Batteries Specifications: Indoor humidity range: 1% to 99% Wireless outdoor temperature range: -21.8°F to 157.8 °F Indoor temperature range: 14.1 °F to 99.8 °F Temperature accuracy: +/- 1.5°F LCD contrast setting: 0 to 7 Transmission range: Up to 330 feet Transmission frequency: 433MHz Swiss precision sensor Power Requirements: Clock : 3 "AA" Alkaline batteries Wireless sensor: 2 "AA" Alkaline batteries