La Crosse Technology Wirelss Indoor/Outdoor Thermometer.  Features include:

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

Size: Receiver 4.25" x 2.75" x 1"
        Sensor: 5.05 " x 1.5" x .83"