Futaba S-C300 - S.BUS digital servo for electric cars compatible with UR-mode This is a middle class digital servo that uses the S.BUS method for electric cars and is compatible with UR mode. Features: General digital servo for cars Supports UR mode and SR mode S.BUS method Metal 2-3 stage gear Aluminum final gear Specs: Speed @6.0V: 0.14sec/60° Speed @7.4V: 0.12sec/60° Torque @ 6.0V: 8.0kg/cm Torque @7.4V: 9.6kg/cm Size: 40.0×20.0×38.1mm Weight: 43g