This Makita DUR368L Line Trimmer is a cordless line trimmer with a loop handle powered by 2x 18v LXT batteries in series. An intelligent and powerful tool, it includes Active Feedback Sensing Technology to shut down the tool if the rotation speed suddenly slows, and torque technology that automatically changes the cutting speed according to the load condition, allowing for optimum effectiveness and efficiency during operation. Description Active Feedback Sensing Technology (AFT): Shuts down the tool if the rotation speed suddenly slows down Automatic Torque Drive Technology: Automatically changes the cutting speed according to load condition for optimum operation Brushless motor Powered by two 18v Li-ion batteries in series to supply energy to the powerful 36v DC motor drive system Dual battery fuel gauge Electronic current limiter for overload protection Electric brake Electronic 3-speed (Hi/Med/Lo) Soft start feature Constant speed control Small protector for better view of cutting