Driven by servo motor, it maintains high-efficient passage: fast, stable and accurate. It has sleek and gorgeous design with three-color collocation. Driven by servo motor, it maintains high-efficient passage: fast, stable and accurate. It has sleek and gorgeous design with three-color collocation. Driven by servo motor, it maintains high-efficient passage: fast, stable and accurate. It has sleek and gorgeous design with three-color collocation.