Name: Electric Drill Controller Motherboard Colour: As shown Voltage: 18-21V Maximum output power: 600W Material: Plastic + Metal Size: as the picture Before testing the machine, you must first connect the wire---fix the motor---install the case---tighten the screw---make sure that the square shaft of the head can be easily rotated without jamming---connect the power supply--- Press down the speed control switch so that there is no gap in the shell! Otherwise, there may be a buzzing alarm! To prevent damage to the motherboard, please follow the requirement. Package Contents: 1*Electric Drill Controller Motherboard Attention: There may be differences in wiring color, base plate color, or other aspects between the actual product and the linked image, but the functions are exactly the same. If you cannot accept it, please think carefully before making the payment! Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.