The ARRI WCU-4 is a compact wireless handheld controller for up to three lens axes – focus, iris and zoom. It has a backlit display with lens and distance data, a focus wheel with adjustable resistance and weighs about 750 g.
It communicates directly with ALEXA Mini and SXT cameras; with other cameras via UMC-4 or cforce mini RF. It is powered by a Sony NP-FM500H battery or a cable from the camera. The manufacturer no longer produces the unit, but it remains a common standard in rental houses.
Ideal for
Why ARRI WCU-4 Wireless Compact Unit
- Three axes – One controller handles focus, iris and zoom.
- Lens data – The display shows lens data and distance readings from optional rangefinders.
- Durability – The body is protected against splashing water and dust.
- Compatibility – Works with UMC-4, cforce mini RF and AMC-1, SMC-1, EMC-1 controllers.
Key specs
| Type | Wireless handheld controller |
|---|---|
| Axes | 3 (focus, iris, zoom) |
| Motors in kit | no (controller only) |
| Compatibility | UMC-4, cforce mini RF, AMC-1, SMC-1, EMC-1, ALEXA, AMIRA |
| Power | Sony NP-FM500H battery or camera cable (cable mode) |
| Weight | 750 g (approx. 780 g with battery) |
Radio and construction
| Frequency | 2.410–2.475 GHz, 8 channels |
|---|---|
| Display | 3″, backlit, lens and distance data |
| Dimensions | 151 × 161 × 90 mm |
| Version | resistant to splashing water and dust |
