This is a very gently used meat thermometer. All is controlled with an app and will send alerts to your phone within a 90 ft radius. The screen shows Celsius but can be changed in the app. Also change your meat type and desired temperature all in the app. I needed more than one probe is the only reason I got a new one. You can use in the oven indoors or in a grill, smoker, griddle, and pellet smoker etc.