Features: This digital humidity thermometer and wet-bulb temperature design combine the functions of humidity meter, temperature meter, wet-bulb temperature and dew point temperature Ideal humidity and thermometer instruments for laboratory, industrial, engineer and professional applications Small appearance, easy to use, a white backlight LCD screen, can be used in the dark environment Humidity and thermometer for use with humidity/ semiconductor sensors High humidity accuracy and temperature accuracy Double display temperature and humidity; Resolution of 0.1% rh, 0.1 ° C/0.1℉. Fast response time, maximum and minimum value measurement Data hold function, showing temperature and humidity at the same time Automatic shutdown function and disable automatic shutdown function are available Specification: Model: HT-86 Dew point temperature: -50℃~60℃(-58℉~140℉) Wet bulb temperature: -20℃~60℃(-4℉~140℉) Resolution: 0.1%RH, 0.1℃/0.1℉ Humidity accuracy: ±3%RH(within 25℃, 10% ~ 90% RH), ±4.5%RH (<10% or >90%RH)(other) Temperature accuracy: ±0.5℃/±0.9℉(10~55℃), ±1.5℃/±3℉(other) Response time RH: 10S（90%25℃） Operating environment: 0 ~40℃( 32~104℉), < 80% RH non-condensing Storage temperature: - 10 ~ 60℃( 14~140℉), < 80% RH non-condensing. Color: yellow Battery: 9V battery (NOT included) Size: 17.5*5cm/6.9*2in Weight: Approx. 176g/6.2oz Package list: 1 x Digital Humidity & Temperature Meter (Battery NOT included) .