This 122 model is a unique unit with two clutches (101-[]-15) and one brake (111-[]-12). Various application controls such as high precision positioning or complex operation can be performed by this single unit. It is easy to mount and handle as well as other units. Two-stage speed change, stopping in constant positions or high-frequency forward-reverse operation is performed by hub input. Braking of output shaft is performed by interrupting the current of clutch and applying current through the brake.