The handcrafted WaterRower A1 S4 Vintage Oak Rower uses a patented water flywheel to emulate the natural feel of rowing through water, delivering a highly efficient aerobic workout. Easy on the joints, it targets all major muscle groups uniformly. The rower features an S4 performance monitor which offers distance, time, interval and optional heart rate training sessions. The S4's PC connectivity also lets you track your essential exercise data like speed, wattage output, distance and calorie burn, enabling you to maximise your workout to meet your specific needs and goals. Enhance your exercise experience, and train like you belong to an elite rowing club from the comfort of your living room with the WaterRower A1 S4 Vintage Oak Rower.