REC Trade 4 Port 4 Switch USB 3.0 Hub 4 Port USB HUB, 4 Port 4 Switch USB 3.0 HUB Splitter, USB Port Extension Hub High Speed with On/Off Switch Multi LED

Plugable Rotating 4-Port USB 3.0 Portable Bus Powered Hub – Plugable Technologies

High Speed 4 Port USB 3.0 Multi HUB Splitter Expansion USB Hub for Desktop PC Laptop Adapter USB HUB（5 pack）

Monoprice 4-port Usb 3.0 Switch Hub : Target

6995 4 Port USB, HUB USB 2.0 HUB Splitter High Speed with On/Off Switc — Deodap

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4 port usb 3.0 hub

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Plugable Rotating 4-Port USB 3.0 Portable Bus Powered Hub – Plugable Technologies

4 Port Aluminum USB 3.0 Hub with Individual On/Off Switches(RSH-516-4)

DIKTOOK 4-Port USB 3.0 Hub with Individual LED Lit Power Switches Quickly add up to four devices with the Our 4-Port USB 3.0 Hub. The thin, lightweight design makes this hub a great travel companion. Especially great for notebooks that come with a limited number of ports. Every port has its own power switch, allowing you to control each port independently. For a stable connection, the devices connected to the 4-Port USB 3.0 Hub must not exceed a combined current of 5 volts 900 mAh.

DIKTOOK 4 Port USB Hub Splitter 3.0 for Desktop Laptop Computer, USB Extender Hub with Individual Switches

How does a USB hub divide up power adequately and safely to so many devices? - Quora