Main Features:  The three-dimensional cooling system has good ventilation and more stable motor performance.  High-precision copper core motor with strong power, high temperature resistance and long life.  30s quickly breaks the wall, the steel chuck, the drill bit is not easy to fall off.  Adopts large trigger switch design, moderate damping force and accurate control.  Ergonomic design handle, soft rubber surround, more comfortable to hold.  One machine with multiple functions, high efficiency and multiple functions, two functions of electric hammer / electric drill in one.  Digital display battery.     Specification:  Color: Black;  Battery Quantity: 1pc, 2pcs, None battery(Optional);  Plug: US Plug, EU Plug(Optional);  Input power frequency: 50-60Hz;  No load speed: 1800r/min;  Hammer frequency: 0-6000p/min;  Max. drill diameter: 20mm;  Battery Capacity: 7500mAh.     Package Contents:  1 x Electric Hammer;  1 x Battery/2 x Batteries/None battery(Optional);  1 x Battery Charger(None battery do not Included);  1 x Box.