Material: ABS Temperature Range: -40~105 (-40~221) Accuracy: 1/ Humidity Range: 0%-100% Accuracy: 3% Heat Index: 21.1~54.4 (70~130) Dew Point Temperature: -40~105 (-40~221) Working Temperature: -30~80 (-22~176) Working Humidity: 10~90%RH Storage Temperature: 0~40 (32~104) Storage Humidity: 0~75%RH Resolution: 0.1/F; 1% relative humidity Product size: about 55 x 90 x 35 mm / 2.2 x 3.5 x 1.4 in Weight: about 128 g / 4.5 oz Power supply: 2 x 1.5 V AA batteries (batteries not included) Simple operation, easy to carry, high precision, accurate and durable, with data hold and backlight functions. Data logging function (up to 80,000 data can be stored), which can be connected to a computer to preview and download data. With time display, low battery alarm, dew point temperature measurement, maximum and minimum measurement and other functions. It can be widely used in the measurement and recording of environmental temperature and humidity in industrial enterprises. The shell made of high-quality ABS material is wear-resistant, not easy to damage, and can be used for a long time.Good quality product