Retro corded handset offers an old-fashioned way to enjoy a comfortable conversation on your mobile phone. Corded handset plugs into standard 3.5mm headphone jack on cell phone. Use at the office, at home or on-the-go. It can be used anywhere. No batteries are required. Simply plug the handset in and instantly use your cell phone just like a retro phone. When the phone rings, simply answer and talk using the retro, corded wire handset. Cord reaches up to 5'. Handset includes basic functions such as volume control, flash and answer/hang up button.