H12 About this product: 【Latest 4-IN-2 USB3.0 Hub for Surface Go/Surface Go2】Connector - Input: USB-C plug x 1 + 3.5mm audio plug x 1. Connector - Output: USB 3.0 port + 3.5 mm audio port + USB 2.0 port + 4K HDMI port (Note: ① This is designed only for Microsoft Surface Go/Surface Go2, so please note that it cannot be used with other Microsoft Surface series. ② Do not use with a protective case.) 【4K HDMI High Resolution Output】The HDMI port mirrors or extends the screen from the USB C of Surface Go/Surface Go2, streaming 4K UHD or Full HD 1080p video directly to an HDTV, reaching up to 4K/2K@30Hz on a monitor or projector. It can be connected to monitors, projectors, TVs, etc. with an HDMI port, and also supports 1080P@60Hz/720P@60Hz. 【USB3.0 port + USB2.0 port】There is one USB3.0 port and one USB2.0 port each. The USB3.0 port has a maximum data transfer speed of 5Gbps and is backward compatible with USB 2.0. You can connect a keyboard, mouse, USB drive, USB hard disk, etc. to your Microsoft Surface Go. The USB2.0 port reaches a transfer speed of 480Mbps and does not interfere with the USB3.0 port even when using wireless devices such as Wi-Fi and Bluetooth. 【3.5 mm audio port】With a 3.5mm audio port, you can easily connect audio playback devices such as earphones.