IBM X220 - Manual (Page 114)

Front view
1 Integrated camera
2 Built-in microphone
3 Security keyhole
4 Tablet digitizer pen
5 Hard disk drive (HDD) or solid state drive (SSD)
6 Combo audio jack
7 Ethernet connector
8 Always On USB connector
9 Media card reader slot
10 TrackPoint pointing stick
11 TrackPoint buttons
12 Touch pad
13 UltraNav ®
14 Volume control buttons
15 ThinkVantage button
16 Power switch
108 ThinkPad X220 Tablet and X220i Tablet Hardware Maintenance Manual