Kit Details


Day Rate: £238 ex VAT     

Hire price for the ARRI WCU-4 is base on a daily rate. Note: We offer competitive operator service.

For more details about hiring this product, please contact us.

  • 16/14 bit native encoder resolution
  • Fully sealed, splash- and dust-proof slider mechanism
  • Built-in vibration motor for tactile feedback
  • LED backlit rotary knob with adjustable friction, 3.0” diameter


The ARRI Wireless Compact Unit WCU-4 is a 3-axis wireless hand unit with integrated lens data display. It works with ALEXA Plus and Studio cameras and UMC-4, SMC-1 and EMC-1 motor controllers. Set includes hand unit, hand strap, lanyard and one plain focus ring.

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.

ALEXA Remote Control
An optional software license will enable you to remote control all ALEXA Plus type cameras, except the ALEXA HD Plus. 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.

Vibrating Markers
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 focus markers are reached.

Backlit Focus Knob
The 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.

Pre-Marked Focus Rings 
Lens scales can be mapped to a set of high quality pre-marked focus rings in metric or imperial scale.

Focus Tracking 
The WCU-4 user button can be configured to activate focus tracking – setting the focus motor to continuously follow a subject by using an ultrasonic distance measurer. Focus tracking works with ARRI’s Ultrasonic Distance Measure UDM-1 and the Universal Motor Controller UMC-4.

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.

Compatible with:

  • ARRI ALEXA Plus 4:3
  • ARRI ALEXA Studio
  • ARRI ALEXA XT Studio
  • ARRI Universal Motor Controller UMC-4
  • ARRI Single Motor Controller SMC-1
  • ARRI ENG Motor Controller EMC-1
  • ARRICAM, ARRI 416PLUS, ARRI 435 Extreme equipped with white radio (basic functionality)
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-QM1 battery 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
  • 16/14 bit native encoder resolution
  • Fully sealed, splash- and dust-proof slider mechanism
  • Built-in vibration motor for tactile feedback
  • LED backlit rotary knob with adjustable friction, 3.0” diameter

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