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 ModelC572rC570uC532rC532uC521rC521u
 Dimensions (LxWxH)71.75" x 25.875" x 52.625"42" x 24" x 55"66" x 26" x 51"40" x 22" x 56"66" x 26" x 51"40" x 22" x 56"
 Unit Weight240 lbs.159 lbs.156 lbs.121 lbs.156 lbs.121 lbs.
 Resistance SourceElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magnetic
 Power SourceSelf-generating with 2 minute battery backupSelf-generating with 2 minute battery backupSelf-generating with 2 minute battery backupSelf-generating with 2 minute battery backupSelf-generating with 2 minute battery backup Self-generating with 2 minute battery backup
 Step ThroughYesN/AYesN/AYesN/A
 Low-Profile ShroudN/AYesN/AYesN/AYes
 Adjustable Seat BackYesN/AYesN/AYesN/A
 Fore and Aft Seat AdjustYesYesYesYesYesYes
 Resistance Levels202020202020
 ProgramsManual/Track, Random, Fit Test, Cardio/Wt Loss, Interval (1:1, 1:2, 2:2), Plateau, Fat Burn, Custom HR, Quick StartManual/Track, Random, Plateau, Interval, Fat Burn, Weight Loss, Cardio, Custom HR, Fitness Test, Quick StartHill (x3), Interval (x2), Manual/Track, Random, Weight Loss HRC, Cardio HRC, ZoneTrainer™, Plateau, Quick Start, 4 User IDsHill (x3), Interval (x2), Manual/Track, Random, Weight Loss HRC, Cardio HRC, ZoneTrainer™, Plateau, Quick Start, 4 User IDs Hill (x3), Interval (x2), Manual/Track, Random, Weight Loss HRC, Cardio HRC, ZoneTrainer™, Quick Start, 4 User IDsHill (x3), Interval (x2), Manual/Track, Random, Weight Loss HRC, Cardio HRC, ZoneTrainer™, Quick Start, 4 User IDs
 Touch-N-Go ProgramsYesYes (after START)YesYesYesYes
 Data ReadoutsCalories, Distance, Time, RPM, Calories per hour, METs, Watts, Speed, Percentage of Goal Completed, Workout Level, Actual Heart Rate, Weight Loss Target Heart Rate, Cardio Conditioning Target Heart RateCalories, Distance, Time, RPM, Cal/Hr, METs, Watts, Speed, Percentage of goal completed, Workout level, Actual heart rate, Target heart rateSpeed, Watts, Calories, Calories/hr, RPM, Distance, Time, Resistance Level, Heart Rate, Target Heart RateSpeed, Watts, Calories, Calories/hr, RPM, Distance, Time, Resistance Level, Heart Rate, Target Heart RateSpeed, Watts, Calories, Calories/hr, RPM, Distance, Time, Resistance Level, Heart Rate, Target Heart RateSpeed, Watts, Calories, Calories/hr, RPM, Distance, Time, Resistance Level, Heart Rate, Target Heart Rate
 DisplayDot matrix and LEDsTri-color dot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDs
 ActivZone™YesYesYesYesYesYes
 CardioAdvisor™YesYesYesYesYesYes
 Entertainment Bracket CompatibleYes, SA ENT-153691060 (now 153691060)Yes, SA ENT-153391140Yes, SA ENT-182091170Yes, SA ENT-154091120Yes, SA ENT-182091170Yes, SA ENT-154091120
 Max User Weight500 lbs.500 lbs. 450 lbs.450 lbs.400 lbs.400 lbs.
 Contact Heart RateYesYesYesYesNoNo
 Telemetry Heart RateYesYesYesYesYesYes
 Commercial Parts WarrantyLifetime frame, 5 years partsLifetime frame, 5 years partsLifetime frame, 5 years partsLifetime frame, 5 years partsLifetime frame, 5 years partsLifetime frame, 5 years parts
 Commercial Labor Warranty1 year1 year 1 year1 year1 year1 year
 CSAFEYesYesNoNoNoNo
 USBYesYesNoNoNoNo
 CertificationsxCE EMC (LVD EMF APPLIED FOR), EMI (AUS), UL1647 CS2.2 68-92Anticipated: CE EMC EMF (LVD APPLIED FOR), EMI (AUS), UL1647 CS2.2 68-92Anticipated: CE EMC EMF (LVD APPLIED FOR), EMI (AUS), UL1647 CS2.2 68-92 Anticipated: CE EMC EMF (LVD APPLIED FOR), EMI (AUS), UL1647 CS2.2 68-92Anticipated: CE EMC EMF (LVD APPLIED FOR), EMI (AUS), UL1647 CS2.2 68-92
 Power RequirementsSELF-POWERED; Fuse: 2A/250V (5*20mm FAST)SELF-POWERED; Fuse: 2A/250V (5*20mm FAST)SELF-POWEREDSELF-POWEREDSELF-POWEREDSELF-POWERED