How many USB devices can you connect ?
Industrial Grade USB HUB Extending 4x USB 2.0 Ports Switchable Dual Hosts also for raspberry pi
DC 5V USB 2.0 HUB Module 1 to 7 Port Hub USB Expansion Module MTT Chip 480Mbps | eBay
USB-HUB-7U - Waveshare Wiki
Industrial Grade USB HUB, Extending 7x USB 2.0 Ports | USB-HUB-7U
BIG7: 7-Port MTT USB Hub for Raspberry Pi (Rev 2) | UUGear
USB hub - Wikipedia
Industrial Grade USB HUB, 4x USB 2.0 Ports, Switchable Dual Hosts US Plug - RobotShop
4 Port USB 2.0 Hub Industrial (-40/185F) - Industrial USB Hubs | StarTech.com Netherlands
BIG7: 7-Port MTT USB Hub for Raspberry Pi (Rev 2) | UUGear
7 Port USB 2.0 Hub Industrial (-40/185F) - Industrial USB Hubs | StarTech.com
DC 5V USB 2.0 HUB Module 1 to 7 Port Hub USB Expansion Module MTT Chip 480Mbps | eBay
BIG7: 7-Port MTT USB Hub for Raspberry Pi (Rev 2) | UUGear
Waveshare Industrial Grade USB HUB, Extending 4x USB 2.0 Ports adopt MTT technology, allows stable and smooth 4x USB connections - AliExpress
Overhub plus alternative MTT USB hubs - Other Elektron Gear - Elektronauts
metal Industrial Grade USB HUB Extending 4x USB 2.0 Ports MTT | eBay
Amazon.com: GEKRY USB 3.0 Hub, USB Data Hub, Metal Case Mountable 7-Port Powered USB Hub 3.0 with 36W AC Adapter-Type A : Electronics
X150 9-Port USB Hub / Power Supply Expansion Board for Raspberry Pi
metal Industrial Grade USB HUB Extending 4x USB 2.0 Ports MTT | eBay
Elektron Overhub – Thomann United States
DC 5V USB 2.0 HUB Module 1 to 7 Port Hub USB Expansion Module MTT Chip 480Mbps | eBay
