Bone Conduction Headphones with Breathing Light- Krcong open ear Bluetooth headphones adopt bone conduction technology which delivers premium audio through the cheekbone, allowing you to be aware of your surroundings while listening to music. Unique cool breathing light design that intelligent wake-up, safe and eye-catching, making outdoor sports safer. Lightweight & Comfortable- The running headphones use a wraparound titanium frame and an ultra-lightweight design of only 29g to maximize fit and comfort, you will not feel any pain even after prolonged wearing. The high-strength memory titanium alloy frame, which can be bent and stretched at will without deformation, is flexible and durable.