ZEEES Adaptor for 3.5mm pin to 2.5mm hole Stereo or Mono Works for Apples iPhones
From hands-free to music in your ears! Listen to the music files on your compatible cell phone with this adapter and your headphones. Just plug this adapter into the hands-free jack on your phone, then plug your headphones into the other end of the adapter for great stereo sound. Let the tunes be heard! Allows you to use common 2.5 mm devices such as headsets, earbuds and headsets with your unit's 3.5 mm accessory jack # MALE END = 3.5mm, # FEMALE END = 2.5mm. Allows connection of most 2.5 mm cellular headsets to Apple original iPhone and iPhone 3G only.  Adapter does not support Microphone feature