Shorten the limit distance,improve the effective space ShortenSafety: Braking systemwith friction transmission against overload Energy-saving: Intelligent dual-speed inverter more energy-efficient, quieter operation Reliable: Phase sequence without dislocation system, fault code display and automatic protection More secure: DF63 models with hoisting chain redundancy design, double security More options: A higher hoisting speed can be selected DF-MC high middle speed low-clearance intelligent frequency series