Product attributes: Hub size (approximately): 8x2.2cm/3.1"x0.9"(D*H), USB cable length (approximately): 55cm / 22". Net weight: 60g. Material: Plastic & Copper & Aluminum. LED Light color: blue.^Maximum date: The maximum data transfer rate is 1tbps, the maximum number of connected devices is 8, and USB 2.0 is compatible with USB 1.1.^Applicable scenarios: Suitable for connecting external hard drives, smart phones or any other USB devices to your computer, or as an adapter to charge your phone. DC hole power supply, to meet your outing needs.^Usage matters: Every time the blue light is on, it means it is working. When connecting to a device for the first time, you need to wait for a few minutes to install the driver before it can be used normally.^System support: Win95/98/Me/2000/XP, Linux2.4andMac os8.5 or above.