With the Relays Sport Wireless In-Ears, Sol Republic inspires especially sporty music lovers. The futuristic design immediately catches the eye and the full range hifi sound reproduction leaves nothing to be desired. Enjoy your music simply and easily wirelessly thanks to Bluetooth connectivity. So you can enjoy your sports activities undisturbed, without an annoying cable hindering you in your activities. The in-ears are water and sweat resistant (IPX4) and shine in a stylish yellow colour. When the battery is fully charged, you can enjoy your music for up to eight hours at a time. The earplugs have a blazing fast charging speed, meaning it only takes 10 minutes to recharge and you'll be listening to your music in about an hour. The FreeFlex earplugs have a slim design and fit any ear. There is also a microphone that you can use for your phone calls. By the way, you can also control this via Siri (iOS). You can adjust the volume of your tracks and the tracks themselves via the controls.