Dimensions:
Receiver: 3.2" x 1.1" x 5.7"
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 Stamp
• Digital Time
• 12 or 24 Hour Time Display
• Can Receive Up to 3 Sensors
• Wall Hanging or Free Standing
• Detachable Stand Included

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
• Transmission Range: Up to 80 Feet
• Transmission Frequency: 433.92 MHz
• Compatible Sensors: TX3U, TX3UP
  
• Power requirements :
  Receiver: 2 "AAA" Alkaline Batteries
  Sensor: 2 "AA" Alkaline Batteries