4 port usb hub: bus-powered usb 3.2 gen 1 (5gbps) expansion hub features a usb-a host connector and 4x usb-a ports, overcurrent protection (ocp) & wake on usb - 4.5w of bus power dynamically shared between 4 downstream ports, with max 4.5w per port
auxiliary power input: the usb hub features a micro usb power input (cable sold separately) to add 4.5w (5v/0.9a) of power to the hub for applications where additional power may be required, such as connecting high power usb devices like ssd drives
compatibility: os independent - supports all operating systems, including windows, macos, linux, chromeos, android - compatible with usb type-a host devices such as lenovo x1 carbon, dell xps, microsoft surface - works w/usb 2.0 devices
extra long cable: bus-powered usb dongle with compact housing, ideal for travel - attached extra-long 1ft. (30cm)