The xFyro Duet earbuds deliver a world-class wireless experience for listening to music and making calls. Built to be ultra-convenient and crafted from durable, hard-wearing materials, these truly wireless earbuds utilize cutting edge v4.2 CSR Bluetooth technology for seamless connection to your devices. Keep the music going for days with up to 40 hours of listening time with the included quick-charge case.Going wireless doesn’t mean you lose sound quality. Experience a concert hall in your ears with extraordinary highs and deep, rich lows thanks to the best in audio engineering with the Duet’s oversized 16mm bass drivers – more than 4x larger than any other earbud in its class. These earbuds are guaranteed to bring the house down in a device less than an inch in diameter.With a proprietary form-fitting shell designed after 3D testing and render from more than 10,000 ears, the xFyro Duet are guaranteed not to fall. These lightweight earbuds feature an ergonomic design that contour to your ear for optimum comfort. Combined with a proprietary silicone material that allows for a better seal that blocks out ambient noise, you’ll experience stunning sound. Take the water-resistant xFyro Duet earbuds with you on any adventure, through rain or snow. With a stealthy built-in microphone and handy button functions, you can conveniently take, make, and redial calls and also pause and play your music with ease.