MCD Elektronik GmbH - USB hub 2.0 6-Port, switchable
What is Powered USB Hub?
Raspberry Pi Zero: Hands-on with the Zero4U 4-Port USB Hub | ZDNet
Hacker friendly USB hub - Hackster.io
USB hubs, multi-port splitters
Buy I-tec Metal Passive Usb 3.0 Hub with 4 Usb Ports Without AC Adapter - Hubs & Concentrators (usb 3.0 (3.1 Gen 1) T at affordable prices — free shipping, real reviews with photos — Joom
B & R 5ACCUSB2.0002-000 HMI USB Hub 2x AP5000 passive
USB hub - Wikipedia
Powered or unpowered—which USB hub should you buy?
Speedlink Snappy EVO USB Hub 4-Port USB 3.0 Passive Black - Multitech Computers Lebanon
SNAPPY EVO USB Hub, 4-Port, USB 2.0, Passive, black | SL-140004-BK