Latest Brushless Motor Technology for excellent effecient and longer runtime.Latest generation 18V XR Li-Ion compact hammer drill driver featuring 4.0Ah XR Li-Ion battery technology.Ultra compact, lightweight design allows use in confined spaces.Two speed all metal transmission for increased runtime and longer tool life.14 position adjustable torque control for consistent screwdriving into a variety of materials.Intelligent trigger design allows for total control of application.