Dimensions:
Receiver: 3.6" x 5.52" x 1.9"

All Features:

• Monitors indoor temperature (°F)
• Monitors indoor humidity (%RH)
• Projects time 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
• LED backlight
• AC power adapter included

Specifications:

• Indoor humidity range: 1% to 99%
• Indoor temperature range: 14°F to 99.9°F
• Projection arm rotates Up to 90°
  
• Power requirements:
• Projection alarm: 2 "AA" Alkaline Batteries or included AC power adapter