1.1. Compatible Batteries: The Blower is suitable for Milwaukee M18 18V Li-ion batteries, such as M18 48-11-1852 48-11-1840, 48-11-1815, 48-11-1820, etc. 2.2. 4-Wind Speeds Switching: Please press the button on the side of the machine to adjust the 4 air speeds: 8M or S, 17M or S, 25M or S, 30M or S according to your needs at any time.The maximum wind speed is up to 130,000RPM, please feel to switch the wind speed according to your needs. 3.3. Wide Range of Uses: It is versatile great for indoor, outdoor, garage. Used for computer dusting, keyboard dusting, leaf blower, corner dusting, cleaning snow falling from cars, BBQ blowing to fuel the fire, clothes drying. 4.4. and Light: The jet blower is compact and lightweight and can be carried easily. So it's perfect for outdoor work, camping, barbecues and more.