From the Manufacturer

The DEWALT D25891K SDS MAX Demo Hammer has a 15 Amp motor for maximum performance and overload protection. The 15-foot-pounds of impact energy provides powerful chipping and faster destruction rates. It incorporates the SHOCKS-Active Vibration Control that reduces vibration up to 50-percent while increasing user comfort and productivity. The electronic variable speed allows the user to control the speed of chipping and impact energy. Its modular design allows easy access to switch, motor, cordset, brushes and gear case for ease of service.