Daily $

The Wireless Compact Unit WCU-4, the upgrade of the already widely adopted WCU-3, combines three axis of lens control with a lens data display in a compact and ergonomic housing. Weighing around 780 grams including battery, it’s one of the lightest hand units in its class, providing unrivaled comfort during a long working day. One of its most prominent features is the tactile vibrating feedback, which allows operators concentrate on the scene, knowing that the hand unit will vibrate to prompt them when markers are reached or when a camera alert occurs, such as for a nearly full recording media or low battery voltage. Other features include:

Backlit Focus Knob

The new, super-smooth focus knob contains an integrated light source that shines through the wide, optionally pre-marked focus ring in low light conditions, thus providing clearly readable focus marks at all times. The friction of the focus knob can be easily adjusted to one’s personal preference without any tools.

Easy-to-Read Lens Data Display 
Clearly arranged, easy-to-read lens and camera information is available on the large 3” display, along with data from optional ultrasonic distance measurement devices. The transflective display technology ensures perfect readability in all ambient lighting conditions. This feature will be available with ALEXA SUP 8.0 onwards.

Pre-Marked Focus Rings 
Lens settings can be mapped to a set of high quality pre-marked focus rings in metric or imperial scale. This feature will be available with ALEXA SUP 8.0 onwards.

Personalized Settings
Various parameters of the WCU-4 can be set up to one’s personal preference. These include the display arrangement, vibration patterns and programmable user button, to name just a few. You can save your preferred settings on an SD card, enabling you to immediately personalize any WCU-4, anywhere in the world.

Technical Specs


Special Features:

  • Built-in vibration motor for tactile feedback

Focus knob:

  • LED backlit rotary knob with adjustable friction, 3.0” diameter
  • 16 bit native encoder resolution

Iris Slider:

  • Fully sealed, splash- and dust-proof slider mechanism
  • 14 bit native encoder resolution

Zoom Knob:

  • Force sensitive knob
  • Ergonomic design


  • Transflective TFT LC-Display (readable in bright sunlight), 3.0 inch diagonal


  • Durable and robust housing made of high-strength anodized aluminum
  • Sealed assembly with backlit display buttons and index marker


  • Approx. 780 grams including battery

Power Supply:

  • NP-FM500H battery (Sony) or compatible batteries
  • BC-VM50 charger (Sony) or compatible chargers
  • Power via LCS cable through ARRI camera (cabled mode)

Operating Temperature:

  • -20°C to +45°C

Software Updates:

  • Via SD card

Our Kit

Our rental package includes:

  • Wireless Compact Unit WCU-4
  • (3x) Lens Control Motors
  • (3x) Motor Cables
  • Long & Short ZMU-3 to WCU-3 cables
  • (3x) Batteries
  • (1x) Charger
  • (3x) Marking Disks

Optional (at additional cost):

  • Universal Motor Controller UMC-3
  • Power Cables

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