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 3μA Temp measurement range: -30°C~70°C The actual product may have slight color difference or difference, which will not affect the use Accuracy: ± 0.5 °C Colour:Photo Color Material:plastic Package Contents: 1 x Temperature Logger Data Logger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 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.