The ARRI WCU-4 Wireless Compact Unit is a 3-axis handheld controller with an integrated lens display. Remotely control camera functions, focus, aperture and/or zoom, e.g. when shooting by hand or with a stabilizer, gimbal or crane. The WCU-4 is compatible with ARRI ALEXA Mini, ALEXA Plus and Studio cameras, as well as ARRI UMC-4, SMC-1, EMC-1 and AMC-1 motor controllers. The camera functions are controllable for ARRI ALEXA Mini, Plus and Studio as well as ARRI AMIRA when used with the UMC-4 motor controller.