TFA sigma wireless weather station. Transmission of outdoor temperature via up to 3 transmitters (maximum 60 m). Indication of indoor temperature, maximum-minimum- function, weather forecast, tendency of atmospheric pressure. Radio controlled clock with date, alarm and snooze function. Time zone ±12 hrs. Main unit: wall mounting or table standing. Inside temperature measuring range: -5 to +50 degree C (+23 to +122 degree F). Outside temperature measuring range: -20 to +60 degree C (-4 to +140 degree F). 2x 1,5 V AA batteries included, EK-EL. Measures 89 mm width by 185 mm height by 31 mm depth.