The XR-1 Nx is as versatile underwater as it is topside. Upon starting your dive, the XR-1 NX will simply display your current depth and how long you can stay there (Dive Time Remaining). While many divers have asked for such simplicity and ease of use, you know that with all the XR-1 Nx's features, theremust be more - and there is. Simply press the button to see more information. Isthis information important to you on a full time basis? Leave it there. Just want to check it and then move on to another display? You can do that too. It's up to you and your new XR-1 Nx. Variable ascent rate indicator will keep you safe upon ascent and slow you down progressively as you head to the surface. Safety stop timer will give you the ability to include the all important 15 ft safety stop which is recommended by all instructional agencies. AERIS Dive Computers are designed with color-coded bar graphs; grey, yellow and red. These graphs monitor nitrogen accumulation and your personal ascent rate. Pixels buildup in each of these color-coded areas to give you a quick, easy reference of these parameters. Proper monitoring of these graphs allows youto select the personal degree of conservatism you wish to build into each dive, putting you in control of your margin of safety. The simple one-button mechanism allows you to have the pertinent information right at your fingertips, even if you're wearing bulky gloves. The XR1 Nx is as versatile enough to meet just about every diver's need s. It can be used merely as a fancy depth and dive time remaining monitor or, with the push of a button, it can be used to alert the diver about his/her safety stop requirements, nitrogen tissue loading rates, altitude adjustments, ascent/decent rates, no-flytimes, and more. Includes now FREE a Digital online class to get the most out of your dive computer. Click here for details