4-port USB 3.0 hub with an optional external power source, by AmazonBasics.
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Pros
Pro Lightweight and portable
This USB 3.0 hub is ideal for on-the-go usage because of its small form factor.
Pro Can automatically switch between power sources
This USB hub can auto-switch between its power source: if you plug in the power adapter while the hub is already connected, it will automatically switch to using the external power source instead of drawing power from the connected computer. This is a huge convenience win when compared to other similar hubs where switching power source requires you to unplug all connected USB devices.
Pro All ports can be used for data transfer or charging
All four ports on this USB hub can function as either data ports or charging ports.
Pro External power is optional
This USB hub is capable of drawing power from the upstream device (i.e. the connected computer), which is mostly sufficient for charging phones and small devices. It also provides an external 5V / 2.5A Power Adapter for when you need more power than your computer’s USB port can provide.
Cons
Con Not meant for power-hungry devices
This USB hub works great when all you need is more USB 3.0 ports for data transfer and charging small devices (phones, etc.), but doesn't work that well for more power-hungry devices such as external hard disks with higher power requirements, or charging iPad/tablets.
Con Not really suitable for desktop use
Due to the lightweight build of this USB hub, it’s not as stationary as other hubs that are heavier. If this hub is not properly secured on a desk (with an object on top, or taped to something), it can be wobbly and wiggle around when a cable connected to it is pulled hard enough (e.g. a USB mouse).
Con Not reliable for wireless keyboard/mouse
There are some issues with using the ports for wireless keyboard/mouse dongles, or any wireless device dongle that operates at 2.4Ghz.
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