The X3-0 elliptical cross-trainer was designed with patented technology for comfort and performance. Life Fitness Link6T elliptical drive system has been perfected over time to offer a comfortable, natural-feeling stride. And with WhisperStrideT technology you will get a remarkably quiet, fluid motion in every workout. The wireless heart rate monitoring system allows you to monitor workout intensity for more effective training. Plus, several workout options give you variety to keep you motivated.