VIEWSONIC VS13730 - Manual (Page 8)

ViewSonic VPC221 3
1.2 Left/Right View
8 Ventilation slot For system cooling
9 USB interface Connect to keyboard, mouse, printer, etc.
10 Card Reader Support SD/MMC/MS/MS PRO Card
11 Supporting Frame Support the main LCD
12 ODD Insert disc, stall program and play music, etc.
13 Internal Mic. Video meeting, dub and recording
[Attention] Your All-In-One PC may not have all the interface above
according to the specific type, please check with the real.