Vyper

* 3 Operating modes (Air, Nitrox and Gauge).

* Complete deco stop data.

* 36 Hour profile memory.

* 36 Hour logbook memory.

* Lifetime history memory.

* Profile memory bookmark.

* Multi step ascent rate indicator.

* Personal adjustment.

* Altitude adjustment 0 - 3000 meters.

*Auto safety stop countdown.

* Extended deco range.

* Built in dive simulator.

* Calendar clock.

* Alarm clock.

* Backlight.

* User replacement battery.

* Depth range 0 - 150 meters.

* Audible alarms.

* Max depth alarm.