Oregon Scientific RMR382-B Wireless Indoor/Outdoor Thermometer with Atomic Clock, Black Indoor/outdoor thermometer from Oregon Scientific; with self-setting atomic clock for precise time Sleek stand-alone base unit; LCD display conveys time, date, indoor and outdoor temperatures, and more Outdoor sensor transmits data from up to 100 feet; accommodates up to 3 sensors Crescendo alarm with 8-minute snooze function; requires separate purchase of 2 AAA and 1 AA batteries Measures 3-3/4 inches wide by 2 inches deep by 4-3/5 inches high; limited 1-year guarantee