The compact, round edge body of the TCM360 in-ear earphones enables a highly comfortable fit. The uniquely long earpiece fits deep within the ear. Special care has also been taken with the sound quality, for robust bass playback from the 9mm driver unit and long sound port. In addition to the well-balanced, high-quality, 9mm Driver Unit, the Long Sound Port fits snugly into the ear with a tight seal to send robust bass sounds directly to the ear. Compact Round Edge Design with Long Ear Piece The TCM360 features a Round Edge Design that has a compact size and gentle fit without concerns about falling out. The special Long Ear Piece fits snugly into the ear with minimizing the sound leakage. And the Triangle Shaped Cord is tangle-free and durable.