VIEWSONIC VS13730 - Manual (Page 9)

ViewSonic VPC221 4
1.3 Back View
14 RJ-45 interface Connect to Internet
15 Audio Input Interface Input audio
16 Audio output interface Audio output, connect to headphone
17 Mic. Interface Connect to microphone outside
18 Power interface Insert power cable and connect to electricity
[Attention] Your All-In-One PC may not have all the interface above
according to the specific type, please check with the real.