This cordless portable blower is designed for blowing away fallen leaves or tree clippings. Equipped with an environment-friendly lithium battery, it is quieter than engine-powered equipment. Though cordless, the powerful motor allows grass and branches to be blown away in one go by increasing the air speed. The weight balance and handle angle are designed to minimize operator fatigue during prolonged periods of use. A 4-level air-flow selector switch is provided on the handle, allowing speedy switching. And combining with the high capacity back pack power supply provides longer runtime.