Schwinn Airdyne Pro Exercise Bike, Silver Single-stage belt drive for instant activation and a smooth, more efficient and effective workout Progressive wind resistance technology to meet the needs of a beginning exerciser to those recovering from an injury to Elite athletes The Custom designed 26-blade fan enables users to burn more calories on the airdyne Pro bike compared to a leading competitor fan bike at the same RPM The console features a Tachometer that visually signals how hard you're exercising - motivational tool that begs you to bury the needle Built in hit programs like 20/10 or 30/90 tab at a programs as well as time, calorie, miles or kilometer programs