Features: 1. Mini size, easy to use 2. Water proof ip65 3. High accuracy 4. Alarm function 5. Including smart software for data analysis 6. Real time monitoring 7. Record 32000 data 8. Lcd display Specifications: Temperature range:-20?~60?(-4?~144?) Accuracy:±0.5? Humidity range: 0-100%rh Accuracy:±3.2%rh Temperature resolution: 0.1? Humidity resolution: 0.1%rh Data port:usb Sampling rate:1s~24hours selectable Power: 3v cr2450 battery Size: 92x35x20mm G.W: 50g Accessories:battery, holder, software cd, manual & giftbox package