ARRI Operator Control Unit OCU-1 SET: Small, solid and lightweight operator control unit with the ability to over-take and return control of lens axis of the WCU-4. You can also use it as a stand-alone operator controllable motor controller (handy also for zoom control by operator). It offers three assignable user buttons and flexible mounting options: 3/8-16 mounting point, Clamp Console 19/15mm and ARRI rosette bracket.