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Category: Wireless Systems
Brand: ARRI
Code: WCU-4

Three Axes - All Inclusive
The Wireless Compact Unit WCU-4 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.

Vibrating Markers and Alerts
Tactile vibrating feedback lets you keep your eye on the action in the most challenging situations. Operators can 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.

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. 

Exceptional Quality and Service
The WCU-4 is completely splash-proof and embodies the reliability and durability for which ARRI is famous. Wear and tear parts are replaceable at rental level, and the worldwide ARRI Service network ensures rapid second level support if needed. New firmware versions can be installed to the unit via SD card within seconds. 

Optional ALEXA Camera Control
An optional software license will enable you to remote control all ALEXA Plus type cameras. This includes setting frame rate, shutter angle, exposure index, false color on the monitor output, and more. Extended camera status information is also available, allowing you to quickly check your camera settings at any time.

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
Display: Transflective TFT LC-Display (readable in bright sunlight) 
3.0 inch diagonal
Housing: Durable and robust housing made of high-strength anodized aluminum 
Sealed assembly with backlit display buttons and index marker
Mass: 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
Supplied Accessories: 1x CD-ROM with operating instructions (English) 
1x quick guide (English) 
1x hand strap 
1x lanyard 
1x plain white focus ring 
1x iris plate

Directly compatible to



  • ARRI ALEXA Plus 4:3

  • ARRI ALEXA Studio

  • ARRI ALEXA XT Studio


  • ARRICAM, ARRI 416PLUS, ARRI 435 Extreme equipped with white radio (basic functionality)

  • ARRI UMC-3A with white coded radio modem (basic functionality)

  • ARRI WZE-3 with white coded radio modem

  • WCU-4
  • WCU-4
  • WCU-4
  • WCU-4

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