3.55mm earphone jack enables comfortable listening to music while charging. 3.55mm audio interface supports stereo sound, connect headphones or audio devices, and is suitable for both office and entertainment use (X3 supports this function). Ports and power USB 3.0 and USB 2.0 interfaces allow connecting multiple USB devices at the same time. USB 2.0: speed up to 480 Mbps, downward compatible with USB 1.1, output power 5V / 500mA. USB 3.0: speed up to 5Gbps, 1GB files can be transmitted in about 3 seconds; downward compatible with USB 2.0 / 1.1, output power 5V / 900mA. TypeC: USB 2.0 transmission rate of 480 Mbps, maximum output power 5V / 1.5A. Multiport expansion Expands a single interface of a thin and light notebook to support multiple devices: USB flash drives, keyboard, mouse, external hard drives, USB small fans, printers, etc. PD charging and hotplug support PD100W fast charging with a PD charging port. Connect a PD power supply to charge a mobile phone or laptop while working. Supports PD3.0 fast charging protocol, with charging power up to 100W. Supports game consoles, and all interfaces can be hotplugged (X3 supports this function). Use scenarios Onthego workstation: connect a laptop, charge your device via PD, listen through the 3.55mm jack, and access multiple USB peripherals at once. Office desk setup: expand a slim notebook's ports to attach a keyboard, mouse, USB drive, external hard drive, printer, and other peripherals without swapping devices. Home entertainment or gaming: charge a mobile device or compatible laptop while using wired audio and expanding USB connections for controllers, storage, or accessories.