Self-powered so you don't have to worry about cords or outlets, heavy-duty welded steel frame is guaranteed for life, belt-drive system lasts much longer than chain-drive systems, built-in Lifepulse heart rate hand sensors in side handlebars, interactive heart rate training to keep you in your heart rate zone, 5 Heart Rate Zone Training+ workouts that respond to your needs, Sport Training™ workout simulates biking outdoors, 13 simple seat adjustments so you can position yourself properly and comfortably, ergonomically correct racing-style handlebars.