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 Time display (manual setting) 12/24 hour time display Wireless outdoor temperature range: -39.8°F to +139.8°F Indoor temperature range: -14.1°F to 139.8 °F Transmission range: Up to 330 feet Transmission frequency: 915 MHz Power Requirements: Receiver: 2 “AAA” Alkaline batteries Wireless sensor: 2 “AA” Alkaline batteries Receiver: 5.1" x 2.47" x 1" Sensor: 5.05 " x 1.5" x .83"