Feature●21-Inch (53.4cm) UV and Weather-Resistant Metal Case with Brushed Gray Oak Finish●Atomic Time Sets Itself and automatically Updates for Daylight savings time (on/off option)●Lighted Dial Technology: Constellation and Dial Details Illuminate in Amber when Darkness falls (on/off option); 6-Hour Auto-off Timer for Lighted Dial helps Conserve Lighted dial battery life; Requires 4 "D" alkaline batteries (not included)●Single AA alkaline battery required (not included) for clock operation; 2 Additional Battery compartments Extend the clock movement Battery Life up to 5 years (optional)●Temperature (F/C) and Humidity Gauges (%RH) with Comfort Level Indicators (DRY, COMFORTABLE, WET/HUMID)Description Bring ambiance to your indoor or outdoor living spaces with La Crosse Technology’s new Indoor/Outdoor Lighted Constellation Atomic Wall Clock. Atomic time sets itself and automatically updates for Daylight Saving Time. The 21-inch metal case with brushed gray oak finish frames a unique glowing night sky map dial that illuminates in darkness. Keep an eye on backyard or home conditions with the easy-to-read temperature and humidity gauges. Durable construction with UV-resistant glass lens ensures long life indoors or outdoors. A stylish conversation piece with old world charm and modern utility from the world leader in atomic time and weather instruments.