Dimensions:
Receiver: 5.48 " x 5.79 " x .93 "
Sensor: 5.34 " x 2.26 " x 2.44 "

• Wireless outdoor temperature (°F or °C)
• Wireless outdoor humidity (%RH)
• Monitors indoor temperature (°F or °C)
• Records MIN/MAX temperature
• Can receive up to 3 sensors
• Time display (manual setting)
• 12/24 hour time display
• Wall hanging or free standing

Specifications:

• Wireless outdoor temperature range: -39.8°F to +139.8°F (-39.9°C to +59.9°C)
• Indoor temperature range: 14.1°F to 139.8°F (-10°C to +59.9°C)
• Wireless humidity range: 1% to 99% (%RH)
• Transmission range: up to 330 feet (100 meters)
• Transmission frequency: 915 MHz
  
• Power Requirements:
  Receiver: 2 "AA" Alkaline batteries
  Wireless sensor: 2 "AA" Alkaline batteries