ITEM NAME:Digital Fish Tank Aquarium Thermometer Terrarium Outside Car Inside Temperature Easy-to-read LCD screen Function of clock display Celsius and Fahrenheit can be converted The inside sensor can measure the air temperature. The outside sensor Simple operation Submerge probe into fish tank or a refrigerator or any place you want to monitor the temperature. You can use the FSW button to switch from "Inside temperature" to "outside temperature" and "Clock" if it needs to ajust the time, pls use the "HR" and "MIN" button. Specifications: Measuring Temperature Range: -50 °C~+70 °C (-58 °F~+158 °F) Accuracy:  ±1 °C Resolution: ≠¥-20 °C, 0.1 °C; ≠¤-20 °Cï ¼Å’1 °C/≠¥-4 °F, 0.1 °F; ≠¤-4 °F, 1 °F Power Supply: 1 x AAA Battery (Not Included) Size: 118x30mm/4.65x1.18" Cable Length: 1m/3.28ft Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you.1 x User Manual. We believe that everything could be solved by communication. Cable Length: 1m/3.28ft. Also note that monitor settings may vary from computer to computer and may distort actual colors.