Samsung LS19WJNKBUXBM - Manual (Page 13)

AUDIO IN Connect the audio cable for your monitor to the audio port on the back
of your computer.
Kensington Lock The Kensington lock is a device used to physically fix the system
when using it in a public place. (The locking device has to be
purchased separately. )
For using a locking device, contact where you purchase it.
Headphone connection terminal
See Connecting the Monitor for further information regarding cable connections.