First degree:

4 angled medium pressure ports, 4 x 3/8” UNF.
2 angled high pressure ports, 2 x 7/16” UNF.
Additional 5th port.
Unique Overbalanced Diaphragm Design - As the diver descends, the overbalancing feature allows the medium pressure gas in the hose to increase at a rate faster than the ambient. This results in superior performance at depth.
An eco-friendly dry system keeps water out of the main spring chamber, preventing ice buildup and protecting against sludge and contamination.

Second degree:

The pneumatically balanced second stage results in smooth and easy breathing.
The XTX's purge buttons are large and easy to operate. It uses a two-stage progressive purge - press the purge on the side for a lower flow rate, useful when more control is required.
The large Venturi lever has a soft rubber grip that makes it easier to find and use. The lever reduces the amount of grit ingress and therefore counteracts any possible friction, ensuring smooth operation. An easy-to-grip opening force adjustment knob keeps the diver in control. A silicone exhaust valve improves regulator breathing.
The Comfo-bite™ eliminates jaw fatigue.