3.5mm TRS Female

A 3.5mm TRS Female connector is commonly used to split a signal from a 3.5mm TRS male jack to a stereo left and right. A TRS cable has a tip, a ring, and a sleeve (usually two black lines), whereas a TS cable only has a tip and a sleeve (only one line).

3.5mm TRS Female connector is also typically used for upsizing a 3.5mm Male TRS adaptor to a 1/4 in Male TRS adaptor. IE when you want to get your small consumer electronics headphones to fit into a more pro level 1/4 in headphone jack.

Often times, you will see 3.5mm TRS Female adaptors split into left & right mono cables, terminating in various endings like RCA and 1/4 TS. A 3.5mm TRS Female connector, while a balanced connector, is normally used to handle stereo signals rather than balanced mono signals.