The next generation of AfterShokz; more comfort and better sound quality at an affordable price. Our latest edition of bone conduction headphones will exceed your expectations with their premium audio, crystal clear calls, lightweight and comfortable fit and open ear design. They're sweat resistant, offer 12+ hours of charge and will stay in place, no matter what you put them through. Take in every aspect of your adventures; hear your music, hear your calls, hear your world, hear it all. Specifications: Speaker type: bone conduction transducers, Frequency response: 20Hz~20KHz, Sensitivity: 101 ± 3dB, Microphone: -49dB ± 3dB, Battery: rechargeable lithium ion, Continuous play: 12 hours, Standby time: 60 days, Charge in: 2 hours, Weight: 1.48 oz (36g), Cord length: Approx. 4ft. Color: Onyx