2.5mm to 3.5mm Audio Converter/Adapter(with microphone)

2.5mm to 3.5mm Audio Converter/Adapter(with microphone)
Converts your cell phone jack opening into a standard 3.5mm jack opening to enable use of all headsets with standard 3.5mm adapter with you handset that do not have that standard 3.5mm opening for a hands-free headset.
Build-in microphone lets you talk on the phone with the adapter connected.