Patented dual-drive system combines chain-driven road feel with belt-driven smoothness. Unlimited air resistance from 13.6" steel blade responds instantly to your effort—the harder you push, the more resistance you get. Commercial-grade steel frame supports 350 lbs. LCD with preset/custom intervals connects via Bluetooth to KINOMAP, ZWIFT, and FED app. 7-level height + 5-level front-to-back seat adjustment fits 4'7"–6'7". Ideal for high-intensity home training. | Fed Fitness | | Air-Resistance Exercise Bike with Dual-Drive System,Smart Air Bike Fan Bike with Preset & Custom Intervals | Black | Best Buy