Single-Shoulder Strap: ● Freely-inclinable engine supports a variety of stances during use. ● Trimmer weight distribution provides optimum balance during use.● Ideal grip shape won’t induce fatigue even if squeezed for extended periods.● Compatible with automobile gasoline.No need to take the effort to make mixed gas.● Eliminates spark plug issues and carburetor stalling.● Starts right up even after long-term storage.● Excellent fuel efficiency: Superior fuel consumption efficiency that only a 4-stroke engine can provide.Does not used mixed gasoline designed to burn oil; kind to the environment and reduces oil consumption.● Reduces harmful emissions such as HC and NOx gases for green operation.Cleared EPA 2005 regulations, the worlds most stringent emissions regulations.