Traditional in-ear headphones could block external canal and sounds from outside, which may be dangerous for users. People who use bone conduction headphones may suffer from sound leakage and low quality audio. So we wanted to apply air-conduction technique that eliminates discomfort from wearing headphones but can still deliver good audio. Our Open Pods / Open Circlet offer a good balance between private space and being aware of surroundings for athletes and meet user’s high sound quality need.