Model name LifeQuality Jeweller , Measuring parameters CO2/Humidity/Temperature , Operating frequency 921 - 922 MHz , Temperature measurement range (inside) (T-T) 0 - 50 °C , Humidity measuring range (inside) (H-H) 0 - 100 % , Connectivity technology Wireless , Colour White , Wireless technology RF Wireless , Power source Battery , Battery life 3 year(s) , Operating temperature (T-T) 0 - 50 °C , Weight 127 g