Device(s) with a 3.5mm TRS audio port
What is a 3.5mm TRS Plug?
TS, TRS and TRRS are all abbreviations for Tip/Sleeve, Tip/Ring/Sleeve and Tip/Ring/Ring/Sleeve. These refer to the amount of contacts on the end of an headset/headphone cable.
TS cables are often thought of as mono, as it only has one contact and is only going to give one solid sound signal.
TRS cables are often though of as stereo, as the addition of the ring gives us two contacts allowing us a left and right audio channel.
TRRS cables usually include both a left and right channel as well as a microphone channel.
The easiest way to identify the three of these is to count the number of black rings on the head of the cable. One ring for TS, two for TRS and three for TRRS.