Features : 1. Temperature and humidity measurement and recording 2. Multi-use temperature data logger with wide measuring range and high accuracy . 3. Universal USB communicating interface no cable no reader even no software required to download data. 4. Lower power consumption and battery is replaceable. 5. Large data capacity it records up to 12 000 points. Specification : Item Type: Temperature and Humidity Logger Material: ABS Color: As shown in the picture Size: 89x36x16mm Weight: Approx.60g/3.5 oz Measurement Range: Temperature: -30-60 degree celsius; Humidity: 0%-100%RH Accuracy: 3%RH; 0.5 degree celsius (-20-40 degree celsius) 1.0 degree celsius(other range) Resolution: 0.1 Data Capacity: 12 000 Start Mode: Button start or delay start Sampling Interval: User configurable (10s - 18h) Alarm Range: User configurable Alarm Delay: User configurable (0-960 minutes) Start Delay: User configurable (0-254 minutes) Battery: 3.0V battery (built-in) Report Format: Generate both PDF and CSV files Protection Grade: IP54 Interface: USB2.0 includes: 1x USB Temperature Humidity Recorder