Features: 86 Type surfaces mounted design: convenient for users to install and use directly, as well as convenient for later maintenance and replacement. Suitable for ceiling fan: It can use to control the wind speed of ceiling fan, ventilation fan and meet their wind speed regulation needs. Five speed regulation: With five gear, users can choose different gear according to their needs, making it convenient to adjust the wind speed. Bands speed regulation: By use bands speed regulation technology, stable wind speed regulation can be achieved, reducing sudden change in wind speed and improving user comfort. Easy to operate: The operations is simple and intuitived, and users can easily control the wind speed of the ceiling fan and adjust the speed. Specifications: Material: ABS+Copper Type: Stepless Speed Regulation, Gear Change Speed Regulation(optional) Size: about 8.6x8.6cm/3.38x3.38inch Power: ≤500W Package Includes: 1x Speed Adjuster note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.