Premium bone conduction headphones for sports. Open-ear design for comfort and safety Innovative bone conduction technology LED lights for better visibility Head movement control to free your hands IP67 sweat & waterproof Up to 10 hours battery + 20 hours with powerbank Anti-wing noise up to 30km/h for sound clarity Measurements 102.5 x 126.5 x 46.5 mm / 4.04 x 4.98 x 1.83 " Weight 33 g / 1.16 oz Case material: Silicone + Titanium Alloy What's in the box?