DESC: The Nautilus NB 3000 series is designed for high-end home use, featuring the V-Force Plus self-generating electromagnetic resistance system. And, because the V-Force Plus system is self-generating it requires no power cords or batteries. The 3000 series bikes use an advanced two-stage drive train designed for smooth quiet operation in any condition.FeaturesSelf-generating electromagnetic resistance and commercial grade molded seats for maximum comfort and durabilityTwo-stage drive train with self-generating electromagnetic resistance allows you to place your bike anywhere without ever having to worry about power cords or batteriesComputer provides a high definition 24 x 16 dot-matrix course profile display and an easy-to-read alpha-numeric display screenFeatures touch heart rate and telemetric Heart Rate Control (HRC) to help monitor your fitnessSpecificationsResistance Levels - 20Resistance System - V-Force PlusDrive System - Two-stage drive train with self-generating electromagnetic