Lenovo ThinkCentre M910t User Manual And Hardware Maintenance Manual page 4

Overview
Card reader slot (optional)
9
Used to read data from a supported memory card.
Microphone connector
10
Used to connect a microphone to your computer. You
can use the microphone to record sounds or interact with
the computer using speech-recognition software.
Headphone connector
11
Used to connect headphones to your computer.
USB 3.0 connectors (4)
12
Used to connect a USB-compatible device. For optimal
data transfer, connect a USB 3.0 device to a USB 3.1 or
USB 3.0 connector instead of a USB 2.0 connector.
Illuminated red dot
13
This indicator is on when the computer is on.
Internal speaker (optional)
14
Used to listen to the sounds from your computer without
using a headset or headphones.
4