The Trekz Air build is 20% lighter than its counterpart with a new organic design that delivers increased comfort. These wireless stereo headphones are the safest alternative to traditional sport headphones and earbuds. Bone conduction technology, an open ear design and a suite of convenient features deliver premium music play and crystal clear calling without compromise. Designed with athletes in mind, Trekz Air are sweatproof, secure, and will allow you to hear your surroundings - no matter where life takes you. 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 iOS and Android Bluetooth-ready smartphones or tablets and Mac and PC computers and laptops. Premium Pitch Plus s 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.