With the latest aesthetic and entertainment upgrades, all of the Integrity Series cardio products now offer an even more compelling user experience. New iPod compatibility and integrated iPod/TV controls keep exercisers motivated and entertained throughout their workout.The groundbreaking DX3 Belt and Deck System combines a lubricant-infused belt, Advanced Belt Tracking System (ABTS) and the patented FlexDeck Shock Absorbtion System for the ultimate in durability and comfort. Heart Rate Monitoring Lifepulse digital heart rate monitoring hand sensors are conveniently placed on the easy-to-grip Ergo bar to provide walkers with precise heart rate monitoring, and Polar telemetry provides runners with accurate, "hands-free" heart rate monitoring. (Telemetry requires optional chest strap.) Rapidworks Service Enhancements Maintenance is fast and easy with Auto Alert diagnostics that inform you of service needs and permanently record and date-stamp maintenance performed.