Thank you for viewing. Based on the latest research in acoustics and psychology, it seems that this product achieves a clear and balanced sound from low to high frequencies, creating a sense of realism and spaciousness as if you were listening to a live performance. Therefore, it seems you can enjoy listening to music without particularly choosing a genre. The swing fit mechanism allows the ear tips to be adjusted left and right, perfectly fitting the angle of the ear canal. This prevents deformation caused by the ear tip opening touching the ear canal, while also allowing the sound to be transmitted directly to the eardrum, resulting in clear sound. Soft silicone is used for the parts that touch the ear, providing a comfortable fit and high sound isolation. Five sizes (SS/S/M/L/LL) are included. You can choose according to your preference. This was a gift, but I have no use for it, so I am selling it. Housing: ABS Driver: 6.4mm dynamic type Sensitivity: 102dB Impedance: 16Ω Weight: 15g Cable length: 1.2m Accessories: Ear tips (5 sizes: SS/S/M/L/LL) final is a Japanese audio brand founded in 1974. With the concept of "thoroughly pursuing what is correct in principle," they have established a new factory in Japan, bringing together the development and manufacturing teams in one place and fostering close communication to pursue high quality.