Kettler Home Exercise/Fitness Equipment: Stroker Rower and Multi-Trainer Machine Displays 6 functions simultaneously: Time, Distance, Energy Consumed, Strokes, Heart Rate and Frequency; Includes a recovery feature which provides a cardio wellness grading indexed 1 to 6 to track improvement Constructed with sturdy, powder-coated steel frame for additional durability; Frame can also fold-up when not in use, reducing space usage Magnetic Brake System resistance can be manually adjusted with indexed settings from 1 to 8, providing a wide and challenging range of resistance Biomechanically correct footplates offer a natural pivoting action providing a full longitudinal rowing motion; Thick, padded seat provides maximum comfort and combines with top grade rollers for smooth performance Includes accessories that attach to provide 10 additional exercises and a Polar T34 chest strap heart rate monitor; LCD display requires 2 "AA" batteries