As a part of the PowerCommand Family of tools, the Black+Decker 20V Smartech Max Easy Feed String Trimmer (LSTE525BT) is engineered to help solve common user frustrations. Features include EasyFeed line advancement with the touch of a button and PowerDrive Transmission for increases torque for more cutting power at the string. The included SmartTech batteries are compatible with the Black+Decker app which allows you to locate, lock and monitor your tools from a smartphone.