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Yes, it does work without power but without it, you won't be able to charge USB devices that require extra current.
Sorry, there was a problem. Please try again later.It is possible to use ST7300USB3 without a power supply, however, doing so may prevent the USB hub or certain high-power USB peripherals from operating. When a power adapter is not used on a hub that comes with a power adapter, power is drawn from the USB port on the computer and then divided between the ports on the hub. This reduces the power delivery to individual ports and high-powered USB peripherals, such as external hard drives, may not start. Atha, StarTech.com Support
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