The Senix 49cc 4-QL backpack leaf blower features a 4-cycle engine that does not require mixing gas and oil, is lightweight, and low vibration for comfortable use. The powerful 49cc engine delivers up to 600 CFM / 200 MPH and 18N of blowing force to easily clear wet, heavy leaves, grass, and other debris. The variable-speed throttle allows you to tackle a variety of jobs, and cruise control maintains your desired speed for extended use.