Will it work with microphone?

1.This headphone extension cable not support for MIC function

2.If your headphone is TRRS (4-conductor), this 3.5mm extension cable will only carry audio, your microhpone and volume control on headphone will not work

What sizes are the aux extender available?

This aux cord extension is available in various sizes and 2-packs for you to purchase (1.5FT / 3FT / 6FT / 10FT /15FT)

If there is audio interference, what should I do?

please unplug the aux extension cable in time after use