Atomic Time & Date IN / OUT Temp Moon Phase 12 / 24 Time Time Alarm with Snooze 4 Languages: English, French, German and Spanish Dimensions: Receiver: 8" x 12.2" x 1.18" Sensor: 5.5" x 1.6" x 1" All Features: Wireless outdoor temperature (°F or °C) Monitors indoor temperature (°F or °C) Moon phase Atomic time and date with manual setting Automatically updates for Daylight Saving Time (on/off option) 12/24 hour time display Perpetual calendar Time zone setting Time alarm with snooze 4 languages to choose from: English, French, German, Spanish Wall hanging or free standing Swiss precision sensor Specifications: Wireless outdoor temperature range: -21.8°F to 140°F Indoor temperature range: 32°F to 122°F Moon phase: 12 phases Transmission range: Up to 330 Feet Transmission frequency: 433.92 MHz Power Requirements: Clock: 2 "AA" Alkaline batteries Wireless sensor: 2 "AA" Alkaline batteries