Package Contents: 2Pack USB hub (1Pack right model 1Pack left model), 30-Day Money Back Guarantee. If anything is wrong or you are not 100% satisfied,Please feel free to contact us,Customer-first is our objective!. Mini usb hub: Size only: L9cm * W2.1cm * H1cm; weight: 24g. the USB extension cable multiple port has been Special designed to be as slim and light as possible, ideal for your working and traveling with ultrabook. easy to store and use. Advanced chipset with good thermal design, will not heat even if used for a long time. Usb port hub has a wide range of compatibility, including USB cables, flash drives, mice, keyboards, mouse, card reader, cellphone OTG adapter, printer, camera, USB fan. Also works with hubs for MacBook Pro 2021/2020/2019, Google Chromebook Pixelbook, Samsung series and laptops and more USB devices. Note: This hub support output max current up to 900mA, so some HDDs that need a current of more than 900mA need an external power adapter. The Usb port extender support USB3.0 Super Speed: 1*USB 3.0 and 3*USB 2.0. The USB 3.0 supports super faster data transfer up to 5Gbps which is 10X faster than USB 2.0 (480 Mbps), which allows you to transfer datas in just seconds; USB extension hub was built in OTG function chip, it can easily connect the mouse, keyboard, USB disk, and other USB devices. USB Hub Right and left Model tansfer a single USB port into 4 USB data ports, you can get 1 USB 3.0 and 3 USB2.0 ports with your laptop. Support 4 ports to work at the same time, without any pressure, and keep the temperature in the middle range. Plug and play, no need driver, easy to use.