Specially Designed Built with the aluminium alloy case, it is specially designed for 13.3-inch or 15.4-inch for MacBook Air 2019 / 2018 and MacBook Pro (2019 / 2018 / 2017 / 2016).No driver required. Plug and play. Support hot swapping function SuperSpeed USB 3.0 Ports Enable you to connect up to three usb peripherals to your MacBook Pro simultaneously and transfer data at up to 5Gbp/s. Backwards compatible with USB 2.0 devices SD / TF Card Reader Enable you to easily access files from an SD card or a TF card directly. Support SD memory cards and TF memory cards of up to 512G 4K HDMI Output Adapter Mirror or extend the display of your MacBook Pro to your TV, monitor or projector in up to 4K UHD (3840 x 2160 at 30Hz) resolution through the HD output port. Backward support 2K / 1080p / 720p / 480p / 360p resolutions. Support converting DP to HDMI 2.0 function Thunderbolt 3 USB 3.1 Type-C port Support Thunderbolt 3 throughput (up to 10 Gbps), 4K (3840 x 2160 at 60Hz) display connectivity, and charging for your MacBook Pro 2019 / 2018 / 2017 / 2016 while connecting to a USB-C power adapter