Pen Style Thermo-Hygrometer with Wet Bulb and Dew Point
(Displays Temperature and Humidity + Dew Point & Wet Bulb Temp. Dew Point Range -20~59.9°C. Humidity Range 0%~100%RH. Humidity Resolution 0.1%RH. Humidity Accuracy At 25C, 10-90%RH, +/-3%,RH others +/-5%RH).