Dimensions:
Receiver: 5.63" x 3.25" x 1.25"
Sensor: 5.5" x 1.625" x 1"

All Features:

• Wireless outdoor temperature (°F or °C)
• Monitors indoor temperature (°F or °C)
• Records MIN/MAX temperature with time and date of recording
• Atomic time and date with manual setting
• Automatically updates for Daylight Saving Time (on/off option)
• 12/24 hour time display
• Perpetual calendar
• Wall hanging or free standing
• Can receive up to 3 sensors

Specifications:

• Wireless outdoor temperature range: -21.8°F to 157.2°F
• Indoor temperature range : 32°F to 140°F
• Temperature accuracy : +/- 1.5°F
• Transmission range : Up to 80 feet
• Transmission frequency : 433.92 MHz
• Compatible sensors: TX3U, TX3UP
  
• Power Requirements:
  Receiver: 2 "AA" Alkaline batteries
  Wireless sensor: 2 "AA" Alkaline batteries