The Cressi Donatello Dive Computer is stylish and functional! It's low profile single-button design features a wide-screen UFDS that makes it easy to navigate through Cressi's computer menus. It features 4 different modes including Air, Nitrox, Gauge and Freediving. An integrated backlight makes it easy to see even when night diving. The Donatello offers extended battery life through a combination of systems: battery saver mode when the computer is not used with automatic power-on. The battery is user-replaceable battery and is easy to change on the go.