Joule is a very small, powerful device for sous vide cooking. Through rapid heating and precise water temperature control, Joule efficiently produces optimal results. With the accompanying smartphone app and the “Visual Doneness” system, users can preview and select exactly how their food will come out before they begin to cook. App-based control allows the manufacturer to consistently update and improve the Joule cooking experience. The device itself is sleek, leak-proof, and easy to clean.