The R90 Rowing Machine by LifeCORE Fitness is an industrial grade rowing ergometer providing a dual air and magnetic adjustable resistance system intended for high performance workouts and cross-training at home. The R90 Rower is the “slim” rail version of the popular light-commercial R100 with an extruded aluminum frame and solid steel supports for stability during even the most vigorous of cardio workouts and interval training. If you are looking to compare rowers and research top rowing machine reviews then the R90 stands head to head with the Concept 2 for home workout studio use! LifeCORE indoor rowers have a unique feature which combines air and magnetic resistance. The R90 rower is equipped with 6 levels of resistance and can be adjusted manually with the resistance dial located below the handle bar. The flywheel is also a fan which generates air as you pull. The first level is all air resistance and then the magnetic resistance is engaged at level 2 and beyond. The flywheel design minimizes noise while maximizing a smooth feel. The LifeCORE Rowers feature a Belt Drive instead of a chain. LifeCORE’s philosophy is that a belt is quieter, no maintenance required, and reliable (same material as a car seat belt). Most of us don’t have the room for a large piece of fitness equipment in our homes. The R90 Rower solves that problem with a simple folding design and a quick release framelock mechanism. A quick turn and pull of the lock pin allows the R90 Rowing Ergometer to be folded up and stored out of the way. Tough and built to last, the R90 is designed to withstand any type of workout when used by sports athletes, active military, crossfit competitors and enthusiasts, and garage gym exercisers up to 300 pounds in weight. Cordless, battery powered operation (requires four C-Cell batteries). Polar compatible wireless heart rate monitoring (chest strap NOT included). Residential warranty within the US: Lifetime frame, 3 years parts, 1 year labor.