CycleOps Jet Fluid Pro Indoor Bicycle Trainer PowerTuned for optimal road-like feel. Progressive resistance offers the widest resistance range and road-like feel. Noise level at 20 mph is a quiet 70-71 decibels. PowerTuned technology provides smooth, realistic accelerations and inertia offering real-world feel for widest range of riders and riding types. Cooler operating temperature delivers long-lasting performance and stable progressive power curve. Smooth, quiet and realistic resistance. Consistent resistance throughout the entire ride regardless of ride type. Pro series frame offers quick installation and removal of bike with ability to lock resistance unit in place for transport and storage.