User's Guide

3. Ethernet extension connector

Gen 2

Make your computer thinner than the ones with a standard Ethernet connector.

Use a ThinkPad Ethernet Extension Adapter Gen 2 to connect your computer to a

local area network (LAN) through this connector. The ThinkPad Ethernet Extension

Adapter Gen 2 is available as an option and shipped with some computer models

only. You can purchase a ThinkPad Ethernet Extension Adapter Gen 2 from

Lenovo at:

https://www.lenovo.com/accessories.

4. Docking-station connector

Connect the computer to one of the following supported docks to extend the

computer capabilities:

• ThinkPad Basic Docking Station

• ThinkPad Pro Docking Station

• ThinkPad Ultra Docking Station

5. Always On USB 3.1 connector

Gen 1

With the Always On USB feature enabled, the Always On USB 3.1 connector Gen

1 can charge a USB-compatible device when the computer is on, off, in sleep

mode, or in hibernation mode.

Notes:

• By default, Always On USB is enabled and Charge in Battery Mode is

disabled in UEFI BIOS.

• When the computer is off or in hibernation mode, and Charge in Battery Mode

is disabled in UEFI BIOS, ensure that you have connected the computer to ac

power.

To enable the Always On USB feature, do the following:

1. Enter the UEFI BIOS menu. See “Enter the UEFI BIOS menu” on page 43.

2. Click Config ➙ USB ➙ Always On USB to enable the Always On USB

feature.

6. Audio connector

Connect headphones or a headset with a 3.5-mm (0.14-inch) and 4-pole plug to

listen to the sound from the computer.

Note: The conventional microphone is not supported.

7. Smart-card slot* Use smart cards for authentication, data storage, and application processing.

Within large organizations, you might also use smart cards for strong security

authentication of single sign-on (SSO). See “Use a microSD card or a smart card ”

on page 31.

* for selected models

X390 Yoga User Guide