4 Port: Great Compatibility: T-Sound 4-port USB hub applies to various devices: laptop, pc, Mac, XBOX, PS4, flash drive, keyboard, mouse, card reader, Mobile HD, printer, camera, USB fan and USB cables * USB3.0 Super Speed: With high efficient USB3.0, T-Sound 4-port USB splitter provides 5 Gbps stable data transfer and is compatible with 2.0/1.0. It's been tested reading, writing speed at 371.19MB/s, 245.97MB/s with USB3.0 device and 43.18MB/s, 40.84MB/s with USB2.0 device 3 Port: Very Small: YaimhSound 3-port USB hub offers 1 USB 3.0 and 2 USB 2.0 ports at the same time instantly and is as small as a finger and weighs only 10g. It's very portable USB hub and greatly reduces the burden and space of backpacks Very Useful: This 3-port USB splitter applies to laptop, pc tower, tablet, all-in-one, printer, car, keyboard, mouse, gamepad, flash drive, card reader, SSD, phone charging, camera, USB fan and USB extension cables. It's plug and play and compatible with 3.0, 2.0, 1.0 and Windows, Mac, Linux systems. It provide extra usb ports for extension from usb a to usb a