Digital thermometer and hygrometer set with external wireless transmitter Control, Airbi Excessive humidity, but also very dry air, can harm our health in various ways. The CONTROL thermo-hygrometer from AirBi can be a reliable helper, because it allows you to check the temperature and humidity of the air inside and outside using the attached wireless sensor . In addition, the device displays a graph of the evolution of humidity over time and icons with ventilation tips , so that you are always up to date with important air quality data. Features:Measures room temperature in the range of -10°C to + 50°C and room humidity in the range of 20-95%;Includes a wireless sensor with temperature and humidity display, which monitors the climate in another location (outdoors or in another room), located at a maximum distance of 100 m (outdoors); Expansion option with up to three wireless sensors; Memory for maximum (MAX) and minimum (MIN) values, since the last manual reset;Radio controlled clock (DCF);Graphical representation on screen of the evolution of humidity over time; Ventilation tips in the form of icons on the screen;Warning against frost or mold formation; Information about the expected change in indoor humidity , if there is an air exchange between the indoor and outdoor space.Technical details:Measurement range : indoor temperature -10°C...+50°C, outdoor temperature (wireless sensor) -20°C...+60°C, humidity 20%...95%;Temperature measurement accuracy : +/- 1°C (between 0°C and +40°C), otherwise +/- 2°C;Humidity measurement accuracy : +/- 5% (between 40% and 80%);Power supply : base station – 3 1.5V AAA batteries (not included); wireless sensor – 2 1.5V AAA batteries (not included);Dimensions : base station 152 x 104 x 22 mm; wireless sensor 50 x 105 x 26 mm;Weight : base station 179 g; wireless sensor 52 g.