The A1 Studio with S4 monitor Rose is a low-maintenance exercise machine that's constructed from high quality ash wood with aluminum mono rail, Rosewood staining, and Danish oil finish-perfect for both residential and commercial use. Engineered with the patented WaterFlywheel resistance method, it gives off life-like water rowing experience while the low noise level and minimal intrusion along with the unique self-regulating resistance with infinite variable allows this exerciser to suit any user without the need for adjustments. With its no impact and non-load bearing, this gym equipment is also made perfect for users with joint problems. Exercise all major muscle groups like the arms, legs, back, shoulders, core, etc. and see how great you're doing with the help of the S4 monitor that comes with the package. It monitors time per 2 or 500 kilometers, watts, calories burned per hour, distance, and the total time of workouts. It also boasts minimal maintenance with no lubrication needed. You simply need to add purification tablet every 3-6 months (tablets come with the package). Storage is easy as well. Simply tip the machine vertically and you can easily lean it against a wall or hide it inside a closet.