Includes indoor/outdoor thermometer, indoor/outdoor hygrometer, temperature display in C/F, max/min memory for hygrometer and thermometer, and multiple temperature trends. Also offers perpetual calendar, 12/24 hour display, back light, alarm with snooze function and sunrise/sunset times. Thermometer: Indoor measurement ranges: 0°C (32°F) ~ 50°C (122°F) (calibration time: 30 sec.), outdoor measurement ranges: -20°C (-4°F) ~ 50°C (122°F) (calibration time: 30 sec). Displays a full weather forecast. 6.25" D x 2.375" W x 6.25" H