The Wireless Compact Unit Arri WCU-3 handset has the capability to control two axes, plus camera run/stop. With a built-in programmable focus knob and thumb slider, its readily available Lithium-ion batteries power the unit for up to 12 hours of continuous operation. The Arri WCU-3 is rugged and weatherproof for demanding production environments. Special attention has been given to ergonomics and durability, with features like an adjustable handgrip, backlit buttons, an illuminated index scale, optional cabled or wireless operation, and sealed precision optical encoders for the manual controls. The integrated backlit color TFT display shows the camera and lens status. It directly communicates with the Universal Motor Controller UMC-3A, which can be attached to the ARRICAM Studio, ARRICAM Lite, ARRIFLEX 235, ARRIFLEX 435, ARRIFLEX D-21, ARRIFLEX 416 and to numerous other still and video cameras. The CLM-3 Lens Control Motor is a very fast, powerful motor, suitable for larger primes and zooms that other motors have difficulty operating.