1,Excellent Performance: The motor speed governor has the advantages of compact size, wide speed range and excellent mechanical characteristics. 2,Long Life: The motor speed controller uses reliable circuit boards and is housed in ABS material for a longer service life. 3,Electromechanical Integration: The motor speed controller has a direct DC voltage start, a brush and brushless DC motor, a miniature gear reducer and a speed sensor and is a mechatronic product. 4,DC Motor Power: The motor speed controller can be used with DC motors of 50W, 100W, 120W, 200W, 300W, 400W, etc. DC motor forward and reverse, please connect Mand,M- to achieve forward and reverse. 5,Outstanding Design: The motor speed controller's chassis has been carefully designed to protect the control board from damage. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia