For 25 years, the StairMaster StepMill has been called the toughest workout in the gym. Now you can bring that same toughness to your home workouts with the SM916. The StepMill is easy to recognize - it"s the piece of cardio equipment that looks brutal compared to all the others, with a revolving set of 8-inch stairs that closely duplicates the workout of actual stair climbing. Each time you mount the StepMill, the unit"s electronically controlled, chain-driven alternator precisely controls the pedal descent, allowing a wide range of users to exercise smoothly within their comfort zones. The resulting step range of 24 to 162 steps per minute will strengthen your legs, boost your cardio, and challenge even the fittest of users. The StepMill offers plenty of workout options, with such programs as quick start, manual, fat burning, calorie burning, speed intervals, custom intervals, random intensity, heart rate intervals, calorie goal, and heart rate zone trainer. The device also offers a nationally recognized multi-stage fitness test that gauges your individual progress, along with a custom firefighter test (CPAT) that measures your cardiopulmonary endurance and muscular strength. (Firefighting is considered one of the most physically demanding jobs in North America, which is why the CPAT is such a natural fit with the StepMill.) Finally, it"s easy to track your progress thanks to the easy-to-read backlit LCD display, which tracks your speed, distance, floors climbed, calories burned, and more. As a bonus, the console is designed to integrate with the NV915 15-inch LCD TV (sold separately), so you can easily keep up to date with your favorite soap opera or sports team. Additional features include Polar-compatible wireless heart rate monitoring; ergonomically designed handrails for support; a water bottle holder, reading rack, and accessory tray that are positioned within easy reach; and a 300-pound capacity.