The Cobalt 2 features a newer more powerful microprocessor, faster compass response and new user options such as auto screen brightness. User selectable gas switches are increased from 3 to six mixes. The menu driven display is self-explanatory at every level and can be mastered in just a few minutes. This simplicity is in contrast to its powerful capabilities and the many advanced user functions available to those who wish to use them. In addition, it uses a rechargeable lithium ion battery that will give the diver between 40 and 60 hours of dive time per charge and a charging adapter that gives the user the option of USB or AC sources.