The Plantronics 43038-01 connects a Plantronics H-series headset directly to cordless phones and other smartphones that have 2.5mm headset jacks.
This item should be compatible with any cell phone that has a 2.5mm stereo headset jack. The cable is approximately 18 inches long.
Use with the following Plantronics headset families:
2.5mm Headset Smartphone Adapter Cable Features: