This is what the pros use! Portable and light weight - smooth start decompression valve that reduces the amount of force needed for startup by 70%. Blade guard adjusts easily without tools.1" Arbor Water connection, 5-stage filtration system, Smooth, square cutting through a wide range of materials. Air inlet ports reduce noise by almost 40%. Air inlet ports can be adjusted for cold weather operation. Proven mass dampening system that significantly reduces vibration for operator comfort. Large double insulated fuel tank for extra impact damage protection. Computerized ignition with digital timing control for easy starting, excellent blade RPM control and consistent power