The earphones have 10 drivers (speakers) balanced armature: four for mids, four for treble, and two for bass. The earphones look very beautiful, and you can see all ten drivers inside them. The sound is very balanced and natural, and it's the best IEM for a balanced and realistic sound. It's very strong in imaging and instrument separation, and the soundstage is excellent. It provides a very special experience with music and insane sound separation in gaming. Its sensitivity is 110db and its impedance is 15ohm. Earphone contents: The included cable is silver-plated copper, flexible, braided, doesn't tangle, and doesn't produce friction noise with clothes. 4 types of eartips in three different sizes. None of them personally suited me except for Tangzu eartips, which I bought for them and gave me a much better experience. Two sound inputs: 3.5 and 4.4, easily interchangeable. And a leather storage case.