Detail 01
3.5 mm female end
You plug an existing 3.5 mm male cable into it. It does not plug into a phone by itself.

Independent shopping perspective
A 3.5 mm stereo jack split out to two separate 1/4" mono plugs, for feeding a phone or laptop into two mixer or interface inputs.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
You plug an existing 3.5 mm male cable into it. It does not plug into a phone by itself.
Detail 02
Each plug carries one channel, unbalanced. Left and right stay separate and need two inputs at the far end.
Detail 03
It separates the stereo pair. It does not mix left and right into a single mono signal.
Detail 04
No noise rejection over distance. Fine for a few feet next to a mixer, worse across a room.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Not directly. The 3.5 mm end is female, so you need a 3.5 mm male-to-male cable between the phone and this Y-cable.
No. It splits the two channels onto separate plugs. To sum them, use a mixer or a dedicated summing cable.
Yes, but you only get that one side of the stereo signal. Anything panned to the other channel will be missing.
You can run a backing track into a line input, but it is not a guitar cable and will not carry an instrument signal well.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.