The ThermoWorks Thermapen One is extremely simple to use. Simply unfold the food probe from the side of the thermometer body, insert it into the food item, and the temperature is instantly displayed on the LCD screen in around one second. We found that it was also super-responsive to constantly rising temperatures, such as when heating sugar and egg whites in a bain-marie for swiss meringue buttercream. The thermometer is available in 10 colors including red, purple, and blue, and has a 1.54 x 1in / 1.43 x 1.185cm (w x h) LCD screen that shows the temperature reading. The LCD automatically rotates based on the position in which the thermometer is being held, so no matter the angle from which you look at it, the reading will always be displayed the right way up.