Katsu - Cordless Chainsawkatsu cordless chainsaw With brushless motor the battery lasts almost twice longer than normal brushed motors; 30cm bar length with the no load chain speed 360m min, powerful motor up to 750W under full battery charged; With a compact size, the comfortable handle design, non slip and shock absorbing, making this chainsaw balanced, maneuverable, and comfortable to operate, use more securely 2 battery choices: 4000mAh 21v or 1500mAh 21v