Keynice Digital Thermometer, Temperature Sensor USB Power Supply, Fahrenheit degree and Degrees Celsius color LCD Display, High Accurate-Black Widely applied -Ideal for seeing temperature in cars, aquariums, pet habitats, HVAC air ducts, computer towers etc Temperature range-58F ~ +230F (-50C ~ +110C) Accuracy: +/-1 unique design-Designed to be flush mounted or can be surface mounted.(Recommended mounting hole: 1.83"x1.08") Voltage input-USB DC5V; Size:1.89"x1.1"x0.67" Easy to Read-This is a nifty little thermometer that can come in handy around the computer or house. It has a very nice color screen, is easy to use, and has good responsiveness.