TRS cables, short for Tip-Ring-Sleeve cables, are audio connectors commonly used to transmit stereo sound. They have three contact points: the tip carries the left audio channel, the ring carries the right channel, and the sleeve serves as the ground. TRS cables are often found in headphones, musical instruments, and professional audio equipment. These cables come in various lengths and can be found in both 1/4-inch and 1/8-inch sizes. They are essential for connecting devices like mixers, amplifiers, and guitars to ensure high-quality audio transmission without interference.