Yamaha 10-FLXUC500-NA Installation And Operation Manual page 7

For optimal audio performance when using Windows, please follow the
instructions in the appendix. No additional configuration is required when
using Apple OS X or Google Chrome OS devices.
If a USB cable longer than the one provided is required, an approved USB
extender should be used. The following USB extenders have been tested and
approved for use with the FLX UC 500. Please note the distance supported by
each USB extender varies and is defined by the manufacturer's specifications:
 USB Ranger 2212 Cat 5 Extender (IC2212R-05-307276) from Icron
Technologies
 USB 1.1 Rover 1850 Single Port Cat 5e extender from Icron
 Gefen USB 2.0 Extender
 Extron USB Extender
7