Lenovo LT2223dwC User Manual page 11

Connect one end of the MHL cable to the monitor MHL port and the other end to the
mobile phone. MHL(Mobile-High-Definition Link) is an audio/video interface for directly
connecting mobile phones and other portable consumer electronic devices to high-
definition displays. This allows user to make the viewing of the connected device on the
monitor screen while charging it simultaneously.
Connect one end of the USB hub cable to the USB connector on the back of the
computer, and the other end to the upstream USB connector on the monitor.
Chapter 1. Getting started 1-7