Bone conduction technology and Open Fit design delivers music through your cheekbones, ensuring ears remain completely open to ambient sounds for maximum situational awareness during long-term wear. The new, organic, wraparound design is 20% lighter than its counterpart to deliver a flexible fit for unnoticeable all-day comfort and stability. Bluetooth v4.2 connectivity and convenient multipoint pairing compatible with your i OS and Android Bluetooth-ready smartphones or tablets and Mac and PC computers and laptops. Premium Pitch Plus guarantees a premium audio experience, including wide dynamic range and rich bass. Enjoy six hours of continuous music + calls on a single charge, or 20 days of standby time. Charges in 2 hours.