ARRI WCU-4 (3-Channel)

Wireless Handheld F/I/Z Controller
For ARRI ALEXA Mini/Plus/Studio & AMIRA
For UMC-4/SMC-1/EMC-1/AMC-1 Controllers
Vibrating Markers, Backlit Focus Knob
Includes Marking Disk, Strap & Lanyard
Requires Sony NP-FM500H-Type Battery