Included is 12/24 Hour Format, Indoor/Outdoor Thermometer Display (C/F), Calendar with Week and Day Display in 7 Languages, Alarm, Low Battery Indicator and Temperature Alert View Your Outdoor Temperature From Indoors 433 MHz Transmitter Frequency with a Range of Up To 30M/100Ft Thermometer: Indoor measurement ranges: 0°C (32°F) ~ 50°C (122°F) (calibration time: 30 seconds), outdoor measurement ranges: -20°C (-4°F) ~ 50°C (122°F) (calibration time: 30 seconds). Temperature trend display either i. 4.75" D x 3" W x 0.75" H