Top features: – Lightweight for comfortable listening – Long-lasting battery for non-stop music on the go or at work – Open design for ambient sound awareness LightweightGo about your daily business without hindrance. The Aftershokz Sportz Titanium Noise-Cancelling Headphones are light enough to make you forget you are wearing them at all. Long-lasting batteryTake advantage of up to 12 hours of battery life. With the Sportz Titanium, you can listen to your music at work all day, enjoy your favourite songs commuting home, and then crank up the volume for an evening session at the gym – all without the need to recharge. Open design Suitable for when you need to be alert and with your wits about you, these Aftershokz headphones are designed so that you not only enjoy the nuances of your music, but that you also can be alert to things going on around you.