Projects Time & OUT Temp IN Temp (°F) & Humidity OUT Temp (°F) Atomic Time & Date Time Alarm with Snooze LED Backlight Dimensions: Receiver: 3.6" x 5.52" x 1.9" All Features: Wireless outdoor temperature (°F) Monitors indoor temperature (°F) Monitors indoor humidity (%RH) Projects time and outdoor temperature (alternating) on wall or ceiling in easy to read numbers Projection and arm rotate for proper viewing Automatic focus of projection Atomic time and date with manual setting Automatically updates for Daylight Saving Time (on/off option) Perpetual calendar Time zone setting Time alarm with snooze AC power adapter included Specifications: Indoor humidity range: 1% to 99% Wireless outdoor temperature range: -21.8°F to 156.2°F Indoor temperature range: 14°F to 99.9°F Projection arm rotates Up to 90° Transmission range: Up to 80 Feet Transmission frequency: 433.92 MHz Power Requirements: Projection alarm: 2 "AA" Alkaline batteries or included AC power adapter Wireless Sensor: 2 "AA" Alkaline batteries