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4 port Powered USB3 hub (powered by power pack, not usb port, unless your powe setup includes providing 5VDC usb socket. USB ports on computers only provide limited voltage to each usb socket and rarely a stable full 5V 1A minimum. Make sure the hub also provides 1A minimum to each socket not just in total to avoid problems. Go for USB3 and connect it to a usb3 socket so as you get usb3 gear (cameras) you can get the best data rates possible.
Also there are usb power hubs out there that ONLY provide good usb power for charging devices and do NOT pass data (I use ones from Orico), so if you have coolers/heaters etc that require no data to control only power to turn on its a better option for those. handy for powering/charging phones and tablets, dont overcrowd your computer usb channels unnesecarily to let them run as best as they can.
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