Product specification: 5 Inch 1500mAh-21V 5 Inch 3000mAh-36V 6 Inch 1500mAh-21V 6 Inch 3000mAh-36V Usage method: 1: First press the safety start button 2: Then press the button for begining to work Before starting the machine, make sure that all accessories are installed properly Three major safety and protection upgrades 1: Two switch protection. Safety switch and start switch, double safety to avoid accidental injury 2: : 90 degree full guard. When cutting, move up and down with the branches to work at ease 3:There is a protective cover on your hands, so you won't be hurt by flying sawdust. The mini chainsaw is a newly designed product. For the subsequent life of it and better usage of sawing, it is recommended that the chainsaw be cooled for 3 minutes after 10 minutes of use when it is used for the first and tenth time. Only in this way can the chainsaw work best in sawing after the tenth time. Easy to carry:The chainsaw is equipped with a lithium batteries of 2000mAH. The Cordless Power Battery lets you say goodbye to the old wired chainsaw. Work quickly and efficiently:The 6-inch chainsaw design can be used for trees with a size of 4-8 inches, and the high-quality chain can reach a speed of 6m/s, helping you to saw wood faster. Equipment maintenance only needs simple oiling and wiping.