Features: ABS Housing: Adopts nylon housing, wear resistance and can provide long service time. Built-In Carbon Brush Motor: it has fine electrical properties, and has certain mechanical strength, and low power consumption. Advantages: Small size, high accuracy, quick-start, timely braking, smoothly speed regulation in a wide ranges, relatively simple control the circuit and so on. Rotation Knob: Anti-slip rotation knob design for easy adjust the working speed. Easy installation: perfect replacement for your old or worn one, and with fine durability. Wide applications: Massage bed, massage chair, physiotherapy bed, dynamic seat, shaker, vibrating plate, vibrating floor artifact, various massagers, etc..