Powerful motor with brushless design for maximum output traction power. Brushless motor provides greater working life time than brush motor. Metal gearbox provides great efficient power transmission and durability of tools. High & low speed control for optimal performance during all applications. Two-position of gear ratio setting design allows user to adjust the trasmission force in various operation. One hand F/R switch design for easy one-hand operation. Temperature and electric current overload protection. Automatic reversing. Precision IC board control. LED swtich on/off button. Battery power indication. Ergonomic comfort-grip handle to reduce user fatigue.