1、【HIGH-PERFORMANCE BRUSHLESS MOTOR】Brushless motor eliminates carbon brushes,enabling the motor to run cooler and efficiently. Meanwhile, brushless motor is compact, dust-protected, lightweight, absolutely maintenance-free and durable. The high-performance motor enables the rotary hammer to deliver up to 0-980 RPM, making it easy to drill in hard materials like concrete and more efficient for users. 2、【DURABLE LITHIUM-ION BATTERY INCLUDED】Rotary hammer contains 1 or 2pcs 5.0Ah large-capacity lithium-ion battery pack, featuring cell protection to protect against overloading, over-discharging and over-heating. Without the hassle of cables, it can offer unlimited freedom of movement. 3、【3 APPLICATION MODES】Mode in 1 knob to manually switch between electric picks, electric hammers and electric drills for drilling on concrete, cement, brick, wood and rock. 4、【OPERATOR & TOOL PROTECTION】This rotary hammer has a torque limiting clutch, which is engineered to automatically disengage gears if the bit binds, eliminating sudden high-torque reaction and preventing gear damage. The shell is made of high strength insulated nylon; the rotor and stator are internally insulated with insulating paper. 5、【COMPACT & COMFORT DESIGN】Compact ergonomic 360-degree grip design brings maximum power thrust. More reasonable design of chute vent is applied to avoid the high temperature of the motor, gearbox and battery.