The 4400 recumbent bike series is the first to combine innovative technology, ease of use and total reliability. From its self-powered (cordless) No-key start-up design to its sealed, dirt-proof internal mechanism, Star Trac's research-tested resistance system gives a real bicycle feel; pedaling motion is smooth and quiet, from its one-piece crank design and quiet dual internal drive belts. Users select from a wide variety of motivating programs at all levels, and can switch programming on the fly. Additional comfort features include front and side-mounted handlebars, built-in lumbar support and proven, ergonomically calculated ratio between the seat and pedals. The machine rolls into position easily on durable casters. Options include QuickCheck Contact Heart Rate system or Polar monitoring system. Pedals and Crank: Standard one-piece crank with sealed bearings Electrical: Self contained power supply; no external electrical power needed. AC adapter available for low-watt start-up Performance: No-key Start-Up. Load Levels: 1 to 30 levels, changeable during workout. Custom default settings. Programs: Hill, Varied, Interval, Manual. Readouts: Work level, elapsed time, total calories, speed, total distance, heart rate. Dimensions: 54"L x 22"W x 50"H Overall Weight: 134 lbs Warranty: 90 days parts, 30 days labor