The Adapt 3.5mm Bluetooth Converter from Outdoor Tech.
Love your buds? Make them wireless. Turn any headphone or audio device with a 3.5mm headphone jack into a Bluetooth wireless receiver/remote control/microphone. Now you can talk on the phone with your old headphones or turn your car stereo into a speakerphone with its built-in mic.
Make sure to clip it to your favorite sweater vest for a totally hands-free experience. You can also skip tracks and control volume without having to touch your Bluetooth device.