This hygrometer is part of the new Weather Station 2 Range from Jacob Jensen™ which provides weather forecasting in a stylish and fun way. Get the instant feeling of your indoor climate or whether to wear the heavy overcoat when going out by simply taking a rapid glance at your new weather station, the bars indicate whether it\'s cold or warm. If more accuracy is needed the bars transform into exact digital numbers by pressing the centre button. The combination of silver aluminium and black elements creates an appealing range due to the sharp and pure lines and the elements fit quietly and stylishly into any home. The Weather Station 2 is a modular series enabling you to build up the range according to your wishes and needs. There is also a separate Multi Sensor available which supports both the Thermometer & Hygrometer and which enables remote sensing of areas up to 100 metres away, as well as Desk and Wall Mounting Kits. PLEASE NOTE: this unit will function on its own, sensing the local humidity, however for full functionality and display you should add the separate Multi Sensor. Registers measurements at position and at remote sites by use of a cordless JACOB JENSEN™ Multi Sensor (to be bought separately). Memory for maximum and minimum values registered. Indicates the comfort level: wet, dry or comfort. Two options for the display: Bar chart or actual digits. Number of sensors: Up to three sensors can be connected. Transmission range (sensor): 100 m unobstructed. Humidity range: 25% - 95% relative humidity. Humidity resolution: 1%. Accuracy: +/- 5% in the range 40 - 80%. Temperature compensation range: -10°C to 60° C. Frequency: 868 MHz. Batteries: 4 x UM-4 (AAA) 1.5 V batteries. Weight: 183 g without batteries. Dimensions: W 205 x H 65 x D 23 mm. Material: ABS, PMMA, PC and aluminium.