Includes 12/24 hour display, date and weekday display, continuous calendar up to 2099, radio controlled clock or manual time settings two daily alarms and automatic snooze function Includes four AAA batteries for the sensor and base. LED back light display, and has a transmission range up to 50 m/150 ft Features temperature display in °C/°F, indoor/outdoor thermometer, indoor hygrometer, min/max display for indoor/outdoor temperature. Temperature ranges between -20°C (-4°F) and 50°C (122°F). 1" D x 4.625" W x 4.75" H