1PC 2.5mm Male to 3.5mm Female Full Metal Stereo Mic Audio Earphone Headphone Plug Jack Adapter Converter Connector For iPhone  

 Item:2.5mm Male to 3.5mm Female Adapter
Condition:New

Specification:
Type: Gold Plated Audio Stereo Adapter/Converter
Connector Diameter: 2.5mm Male (Plug) / 3.5mm Female (Jack)
Outside Diameter of 2.5mm: approx.  3/32 inch
Contact Version: TRRS (Stereo and MIC)
Why I need it?  Many phones and other digital devices today come with a 2.5mm headset plug, which will not allow a 3.5mm headset to be used.  This allows you to use your favorite 3.5mm headset on whichever 2.5mm device you wish.
The slim design makes this the best style to use, there are no extra cords or odd angles, just plug and go.

Package Included:

1pc 2.5mm Male to 3.5mm Female Stereo Mic Audio Earphone Plug Jack Adapter