ARRI WCU 4 (WCU-4) Wireless Compact Unit K2.72103.0

SKU: K2.72103.0 Brand:

£5,715.00 ex.Vat £6,858.00 inc.Vat

In Stock

The ARRI WCU 4 Wireless Compact Unit combines three axes of lens control with a lens data display in a compact and ergonomic housing.

Product Description

ARRI WCU 4 Wireless Compact Unit

Three Axes - All Inclusive

The ARRI WCU 4 Wireless Compact Unit combines three axes 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 unrivalled comfort during a long working day.

ALEXA Remote Control

An optional software license will enable you to remote control all ARRI ALEXA Plus type cameras, except the ARRI Alexa HD Plus. This includes setting frame rate, shutter angle, exposure index, false colour 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 ARRI WCU-4 Wireless Compact Unit 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 ARRI Alexa Plus or ARRI Alexa Studio cameras or the Universal Motor Controller UMC-4.

Multiple Mounting Options

The ARRI WCU 4 Wireless Compact Unit features M4 mounting points on its top and bottom, and the optional ARRI WCU 4 Plate (K2.0006501) can attach to either, providing various 1/4-20 UNC and 3/8-16 UNC mounting points itself. When mounted on the bottom, the ARRI WCU-4 Plate serves as a table stand or can be used to accept a 3/8-16 UNC spigot for mounting on a C-stand. When mounted on top, it can be used to adapt the ARRI Wireless Compact Unit to an onboard monitoring system. Weighing only 67 g, the ARRI WCU 4 Plate is made of durable, aircraft-grade aluminium.

Personalized Settings

Various parameters of the ARRI WCU 4 Wireless Compact Unit 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 ARRI Wireless Compact Unit, anywhere in the world.

Exceptional Quality and Service

The ARRI WCU 4 Wireless Compact Unit is completely splash-proof and embodies the reliability and durability for which ARRI is famous. Wear and tear parts are replaceable at the 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.

For a full video tutorial of the ARRI Wireless Compact Unit, please click here

Compatible with:

  • Universal Motor Controller UMC-4
  • Single Motor Controller SMC-1
  • ENG Motor Controller EMC-1
  • Active Motor Controller AMC-1
  • cforce mini RF
  • ARRI Alexa Mini
  • ARRI Alexa Plus
  • ARRI Alexa Plus 4:3
  • ARRI Alexa XT Plus
  • ARRI Alexa SXT Plus
  • ARRI Alexa Studio
  • ARRI Alexa XT Studio
  • ARRI Alexa SXT Studio
  • ARRI Alexa LF
  • ARRI Alexa 65
  • ARRICAM, ARRI 416PLUS, ARRI 435 Extreme equipped with white radio (basic functionality)
  • 3-axis operation for Iris, Focus and Zoom
  • Backlit focus ring
  • Adjustable friction, very smooth
  • On-Screen Display for Lens Data Display.
  • Adjustable vibration alarm
  • Pre-Marked Focus rings (Optional)
  • Individual settings stored
  • ARRI Alexa Plus, ARRI Studio and ARRI XT compatible
  • Used with ARRI UMC-3A in basis functions
  • Highest quality and service
  • Software update via SD card
  • Lightweight and ergonomic housing
  • Power supply via Sony NP-FM 500 Battery or AC Power
  • Only 780Gramm with Battery Set consisting of the WCU-4 control unit, hand strap, lanyard, marking ring and manual. Optional Required: K2.47851.0 - Battery (Sony) NP-FM 500 H K2.47852.0 - Charger (Sony)


Special FeaturesBuilt-in vibration motor for tactile feedback
Focus knobLED backlit rotary knob with adjustable friction, 3.0” diameter
16 bit native encoder resolution
Iris SliderFully sealed, splash- and dust-proof slider mechanism
14 bit native encoder resolution
Zoom KnobForce sensitive knob
Ergonomic design
DisplayTransflective TFT LC-Display (readable in bright sunlight) 3.0 inch diagonal
Operating Frequency2.4GHz (8 Manually selectable channels)
HousingDurable and robust housing made of high-strength anodized aluminum
Sealed assembly with backlit display buttons and index marker
MassApprox. 780 grams including battery
Power SupplyNP-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 UpdatesVia SD card
  • 1 x WCU-4 Handset K2.72103.0
  • 1 x Plain White Focus Ring for WCU-4, SXU-1 K2.72117.0
  • 1 x Hand Strap for WCU-4 K2.0002067
  • 1 x Lanyard for WCU-4 K2.0002069
  • 1 x User Manual (English)
  • 1 x SD Card

Customer Reviews


There are no reviews yet.

Be the first to review “ARRI WCU 4 (WCU-4) Wireless Compact Unit K2.72103.0”