1It is simple to operate, easy to carry, high accuracy, accurate and durable, with data retention and backlight functions. 2Data logging function (up to 80,000 data can be stored), can be connected to a computer to preview and download data. 3It has multiple functions such as time display, low battery alarm, dew point temperature measurement, maximum and minimum measurement. 4It can be widely used in the measurement and recording of environmental temperature and humidity in industrial enterprises. 5The shell made of highquality ABS material is resistant to wear, not easy to damage, and can be used for a long time. Item Type: Temperature Humidity Recorder 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) Operating Temperature: -30~80(-22~176) Operating Humidity: 10~90%RH Storage temperature: 0~40(32~104) Storage Humidity: 0~75%RH Resolution: 0.1/; 1%RH Product Size: Approx. 55 x 90 x 35mm/ 2.2 x 3.5 x 1.4in Weight: Approx. 128g/4.5oz Working Power Supply: 2 x 1.5V AA Battery (Battery Not Included) How to Use: First Way: Connect the power via USB, you can use it; Second Way: Insert the battery, the screen display can be used, there are relative parameter adjustments on the product, the user can adjust appropriately. This data logging function (up to 80,000 data can be stored), can be connected to a computer to preview and download data. 1 x Temperature Humidity Recorder (Battery Not Included) 1 x Data Cable 1 x CD 1 x Instruction