Dynamax Pro Trainer 12086PC Core Strengthening System Core strengthening System for improving upper body through resistance and isometrics Generates roughly 178 pounds of resistance and top speed of 6, rpm Helps user maintain balance, speed, and endurance, built-in Starter and LED lights Made of machine-molded, high-strength plastic, easy-to-grip foam rubber handles Includes Instructional training DVD Core strengthening system for improving upper body through resistance and isometrics Generates roughly 178 pounds of resistance and top speed of 6,000 rpm Helps user maintain balance, speed, and endurance; built-in starter and LED lights Made of machine-molded, high-strength plastic; easy-to-grip foam rubber handles Includes instructional training DVD