Easy to Operate-- This AC motor speed controller has built-in capacitor for convenient use. With speed control knob can adjust motor speed and be displayed in real time, very easy to install, superior in performance and easy in maintenance. Multi-functional Use -- This Speed Controller Regulator AC has high practicability, which can be widely used in packaging, printing, food, electronics, instruments, medical equipment, clothing industry production line for speed drive device. Service-- 1 Year , test before shipping, fast money refund & new replacement! We provide customer service, please us if there is ANY problem! Premium Motor Speed Controller-- This AC motor speed controller made of high-temperature and flame-retardant material, no deformation, not easily damaged, and sturdy for long time service! High Performance Controller-- Designed with small size, this AC motor speed controller swithch is practical, high precision, with wide rang of speed regulation and low power consumption.