Compatible with most MP3 players, cell phones and other devices with a 3.5mm headphone jack; allows you to play audio through a cassette player; stereo jack; 31-inch cable included

The Lucyd Antimatter titanium frames weigh just over an ounce, and with their enhanced flexibility will fit most users out of the box. These patent-pending Bluetooth frames offer a unique mix of durable titanium, designer styling, optional vision correction, and smart features. All Lucyd frames include a 7-day moneyback guarantee and 1-year warranty against any defects in frame or lenses.