Feature: 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 M+,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. Specification: Item Type: Motor Speed Controller Material: ABS Input: 220VAC Output: 110VDC External Size: Approx. 100 x 60 x 114mm / 3.94 x 2.36 x 4.49in Opening Size: Approx. 81 x 53mm / 3.19 x 2.09in Mounting Method: Panel screw mounting. Package List: 1 x Motor Speed Controller