The audio adapter is designed for the Kyocera Hydro Edge:

• Kyocera Hydro Edge

If you prefer to use a 2.5mm headset with your Kyocera Hydro Edge cell phone, you will need to plug in the 2.5mm audio adapter in order for the headset to work. Just plug this audio adapter into your cell phone to convert the audio. This adapter allows you to use a 2.5 headset with your Kyocera Hydro Edge phone.

• Easily installs; simply plug the audio adapter into your Kyocera Hydro Edge cell phone audio jack; then plug in any 2.5mm, two ring headset into the audio adapter