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