COMMERCIAL AIR ROWER.DURABLE CHAIN DRIVEN SYSTEM FOR PROFESSIONAL ROWING.10.16 CM. (4") FSTN. MATRIX CONSOLE DISPLAY, TIME, DISTANCE, SPEED, STROKES, CALORIES, WATT AND 8 DISPLAY OPTIONS FOR TRAINING.SELF POWER GENERATOR SYSTEM OFFER HIGH WATTAGE OUTPUT QUITE RUNNING AND LOW VIBRATION THROUGH OUT TH..