Article number: 4009816033932 View all from TFA > View more: Hygrometers > Barometer, thermometer and hygrometer in one Save on gas or energy by monitoring the humidity in your home or office. When the humidity in your home or office is high, heating the room costs more energy than when it is low. You can measure humidity with hygrometers. Then you know whether you need to ventilate the room better or whether you need to increase the humidity. These factors influence the humidity level in a room: plants and pets the number of people (due to breathing and perspiration) the degree of ventilation the use of humidifiers activities that use water, such as cooking, showering and mopping This specific model works via the internet, provides graphs of the air pressure of the past 24 hours and can connect to a smartphone app. Product specifications Barometer - Thermometer - Hygrometer - Cosy Baro Item description Barometer - Thermometer - Hygrometer - Cosy Baro Item number 4009816033932 Type Digital Type Measuring = Knowing Temperature measuring range: -10°C to 60°C Humidity measuring range: 1% to 99% Air pressure measuring range: 913hPa to 1113hPa Graph of air pressure over the past 24 hours. Combination with WeatherHub gateway enables many optional functions via smartphone app (WeatherHub gateway not included) Batteries not included