Wireless Outdoor Temperature Sensor Atomic Time and Date IN / OUT Temp 12 / 24 Time Time Alarm with Snooze 4 Languages:? English, French, German and Spanish Dimensions: Receiver: 8.9" x 1.2" x 7.1" Sensor: 1.28" x 3.41" x 0.56". All Features: Wireless outdoor temperature (°F or °C) Monitors indoor temperature (°F or °C) 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. Specifications: Wireless outdoor temperature range: -39.8°F to 139.8°F Indoor temperature range: 14.2°F to 99.9°F Transmission range: Up to 200 Feet Transmission frequency: 915 MHz? Power Requirements: Clock: 2 "AA" Alkaline batteries Wireless sensor: 2 "AAA" Alkaline batteries.