Three instruments in one. Air, Nitrox and Gauge. Vyper features full decompression capabilities and combines several technological innovations into one product.  Vyper offers everything a diver could possibly need for diving with standard Air or nitrox mixes. It can also be used as a depth gauge and timer with profile memory, making it ideal for professional and technical diving applications. Vyper features a unique advisory system that guides the user. The SMART and scroll push buttons give easy access to the multiple functions of the computer, both in and out of the water.