Dimensions:
Receiver: 3.85" x 2.44" x 1"
Sensor: 5.5" x 1.6" x 1"

All Features:

• Wireless Outdoor Temperature (°F)
• Monitors Indoor Temperature (°F)
• Records MIN & MAX Temperature
• Can Receive Up to 3 Sensors
• Wall Hanging or Free Standing

Specifications:

• Wireless outdoor temperature range : -21.8°F to 157.8°F
• Indoor temperature range : 32°F to 139.8°F
• Temperature accuracy : +/- 1.5°F
• Transmission range : Up to 80 feet
• Transmission frequency : 433.92 MHz
• Compatible sensor: TX3U, TX3UP
  
• Power Requirements:
  Receiver: 2 "AAA" Alkaline batteries
  Wireless sensor: 2 "AA" Alkaline batteries