Need to know how to dress for the day? Get all the info you need with this La Crosse® Wireless Temperature Station with Time. Get a quick read on the Indoor and Outdoor temperature in °F or °C on its easy-to-read LCD. Trend indicator arrows show you the temperature change within a 3-hour period. If the arrow is up, the temperature has increased. Arrow down means the temperature dropped. Display and sensor are both powered by (2) AA batteries (not included).