The RS 6661A-4USB allocates the 40Gb/s of transfer bandwidth provided by Thunderbolt™ 3 connectivity to power four dedicated 10Gbs USB 3.1 channels.
 
RS6661A-4USB key features:
Thunderbolt™ 3 to 4x 10Gb/s USB 3.1 Type-C Ports
Dedicated 10Gb/s per-port performance
Supports up to 4x USB 3.1/3.0/2.0 devices
Works with any Thunderbolt™ 3 capable Mac or PC