The First Alert Radio Controlled Weather Station Alarm Clock with Wireless Sensor provides you with the most up-to-date indoor/ outdoor weather information. This clock features a radio controlled clock with alarm and snooze functions. An assortment of 3D weather symbols let you know if the outside weather is sunny, cloudy, slightly cloudy, or rainy. Enjoy easy setup with auto set clock via radio controlled WWVB and DST update. Time zone select and 7 language options are a few additional features. The outdoor remote sensor can be located up to 99 feet away from the weather station. This device operates on 120V AC (adaptor included) or on 3 x "AAA" batteries (not included).