This is YQ-2108-15 8" cordless chainsaw (s) eight inches. 21V over 6.0Ah It is classed as a cordless tools family tree saw. Comes with a brushless motor, which is better in many ways from an efficiency and longevity perspective. It also features hassle-free, cordless operation that lets you roam around while working. Whether used for forestry work or just taking care of trees in a backyard, this chainsaw is an efficient tool having the advantage of using advanced brushless motor and cordless design.