18" Metal Atomic Time Updates for DST Analog Hygrometer (%RH) Analog Thermometer (°F and °C) Dimensions: Receiver: 18" Diameter All Features: Analog Temperature (°F and °C) Analog Hygrometer (%RH) Atomic time with manual setting Automatically sets to exact time Accurate to the second Automatically updates for daylight saving time (on/off option) 4 time zone settings Simple operation: insert 1 "AA" alkaline battery Specifications: Temperature range: -10°F to +130°F and -30°C to +60°C Humidity range: 1% to 99% (%RH) Simple Operation: Insert One “AA” Alkaline Battery After signal is received, press Time Zone button to set Four Time Zone Settings Daylight Saving Time Option On/Off Manual Reset Button Power requirements: Clock: One “AA” Alkaline Battery