The KW3-801AVB is part of the Lucky Light series of products manufactured by Lucky Light. This is a multi-function aluminum alloy housing wheel type panel controller, with a side mounted power button, built-in switching voltage regulator, and a waterproof cover. It is used to control motors, fans, and various low-voltage switches and relays. It features an adjustable three-phase motor speed and a slip clutch, which helps the motor stay in a certain speed when it is working and keeps the motor speed uniform. It also features LED indicators and a manual switch control, which is used to start and stop motor functions. This product is also resistant to shock and vibration, making it a great choice for a wide range of industrial applications.