Dimensions:
Receiver: 6" x 2.5" x 1"
Sensor: 5.5" x 1.6" x 1"

All Features:

• Wireless outdoor temperature (°F or °C)
• Monitors indoor temperature (°F or °C)
• Records MIN/MAX temperature with time of recording
• Time display (manual setting)
• 12/24 hour time display
• Wall hanging or free standing
• Detachable stand included
• Can receive up to 3 sensors

Specifications:

• Wireless outdoor temperature range: -21.8°F to +156.2°F
• Indoor temperature range: 32°F to 140°F
• Temperature accuracy: +/- 1.5°F
• Temperature resolution: 0.2°F
• Transmission range: Up to 80 Feet
• Transmission frequency: 433.92 MHz
• Compatible sensors: TX3U, TX3UP
  
• Power Requirements:
  Receiver: 2 “AAA” Alkaline batteries
  Wireless sensor: 2 "AA" Alkaline batteries