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 ModelUB521MC572rC572uC532rC532uC521mC521rC521u
 Dimensions (LxWxH)69.3" x 31.5" x 55"71.75" x 25.875" x 52.625"45" x 23.5" x 55.25"66" x 26" x 51"40" x 22" x 56"67" x 27" x 50"66" x 26" x 51"40" x 22" x 56"
 Unit Weight247 lbs.240 lbs.161 lbs.156 lbs.121 lbs.183 lbs.156 lbs.121 lbs.
 Resistance SourceElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magneticElectro-magnetic
 Power Source110vSelf-generatingSelf-generatingSelf-generatingSelf-generating110vSelf-generatingSelf-generating
 Step ThroughYesYesN/AYesN/AYesYesN/A
 Low-Profile ShroudN/AN/AYesN/AYesN/AN/AYes
 Adjustable Seat BackN/AYesN/AYesN/AYesYesN/A
 Fore and Aft Seat AdjustYes, 20 positionsYesYesYesYesYesYesYes
 Resistance Levels20 (bi-directional)2020202020 (bi-directional)2020
 ProgramsCustom Interval, Random, Hill, Track, Iso Kinetic, Iso Strength, Custom HR, Cardio/Wt LossManual/Track, Random, Fit Test, Cardio/Wt Loss, Interval (1:1, 1:2, 2:2), Plateau, Fat Burn, Custom HR, Quick StartManual/Track, Random, Fit Test, Cardio/Wt Loss, Interval (1:1, 1:2, 2:2), Plateau, Fat Burn, Custom HR, 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 Custom Interval, Random, Hill, Track, Iso Kinetic, Iso Strength, Custom HR, Cardio/Wt LossHill (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 ProgramsYesYesYesYesYesYesYesYes
 Data ReadoutsWorkout level, Calories, Time, RPM, Distance, METS, Watts, Speed, Actual heart rate, Target heart rateCalories, 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, Calories per hour, METs, Watts, Speed, Percentage of Goal Completed, Workout Level, Actual Heart Rate, Weight Loss Target Heart Rate, Cardio Conditioning 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 RateWorkout level, Calories, Time, RPM, Distance, METS, Watts, Speed, 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 Rate
 DisplayDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDsDot matrix and LEDs
 ActivZone™YesYesYesYesYesYesYesYes
 CardioAdvisor™YesYesYesYesYesYesYesYes
 Entertainment Bracket CompatibleNoYesYesYesYesNoYesYes
 Max User Weight500 lbs.500 lbs.500 lbs.450 lbs.450 lbs.450 lbs.400 lbs.400 lbs.
 Contact Heart RateNoYesYesYesYesNoNoNo
 Telemetry Heart RateYesYesYesYesYesYesYesYes
 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 partsLifetime frame, 5 years partsLifetime frame, 5 years parts
 Commercial Labor Warranty1 year1 year1 year1 year1 year1 year1 year1 year
 CSAFENoYesYesNoNoNoNoNo
 USBYesYesYesNoNoNoNoNo
 CertificationsUL1647 5th Ed. 2011, C22.2 No. 68, FCC UL1647, C22.2 No. 68, FCC UL1647, C22.2 No. 68, FCC UL1647, C22.2 No. 68, FCCUL1647, C22.2 No. 68, FCCUL1647 5th Ed. 2011, C22.2 No. 68, FCC UL1647, C22.2 No. 68, FCCUL1647, C22.2 No. 68, FCC
 Power Requirements110VSELF-POWERED; Fuse: 2A/250V (5*20mm FAST)SELF-POWERED; Fuse: 2A/250V (5*20mm FAST)SELF-POWEREDSELF-POWERED110V SELF-POWEREDSELF-POWERED
 Use Profile High-use facility 24/7High-use facility 24/7No fees facilityNo fees facilityNo fees facilityNo fees facilityNo fees facility