relative humidity 23 ± 5 °C / 73 ± 9 °F
dry bulb temperature (DBT):
-20 ~ 65 °C /- 4 ~ 150 °F
wet bulb temperature (WBT):
-20 ~ 65 °C/-4 ~ 150 °F
battery life: 40 hours of continuous use
battery: one CR2032 lithium battery
dimensions: 54.9x52.6x43 mm