Fangrui Product Details High Accuracy: The Product Error Is 0.5 Degree Celsius, High Precision, More Accurate Measurement. Low Power Consumption Temperature Alarm: Low Power Consumption Design, Long Battery Life, Up To 360 Days Of Continuous Recording. High And Low Temperature Alarm, Red Light Flashing Alarm When Over Temperature. Help You Find The Abnormal Temperature Condition In Time To Avoid Economic Loss. Easy To Use: The Temperature Logger Can Record A Maximum Of 20,000 Pieces Of Data, Usb Connector Design, Easy To Read Just Plug Into The Computer To Generate Pdf Format Temperature Data. Wide Range Of Uses: Applied To Fruits And Vegetables, Food, Seafood, Medicine And Chemical Industry, Cold Chain Transportation, Etc. Product Parameter: Working Voltage: 3v Maximum Number Of Recorded Data: 20000 Sets Sampling Interval: 1 Minute To 4 Minutes Resolution: 0.1 C Two Led Indicator Lights: Green=ok, Red=alarm Battery Model: Cr2032 Waterproof Grade: Ip67 Working Current: Approximately 3a Temp Measurement Range: -30c~70c