Shoulder strap type; Freely angled engine that can be used for any posture; Optimized balance of weight distribution of grass trimmers during work. The ideal grip shape prevents fatigue even after holding it. Can be used with car gasoline. No need to worry about making mixed gasoline. Eliminates plug ratches, stiffness, and carburetor clogs. Excellent startability even after long-term storage. Superior fuel economy performance: High efficiency combustion unique to 4-stroke reduces fuel economy. It does not use mixed gasoline to burn the oil, so it is environmentally friendly and reduces oil consumption. Reduces harmful emissions such as HC and NOx engines in pursuit of cleanliness. Cleared the worlds most stringent emissions regulations (EPA 2005).