I bought these in October to listen to music from my smartphone outside. I'm satisfied with the high-quality sound that wireless headphones, which are currently popular, can't match. There's no hassle of charging or worry about delays. I'm impressed that I can enjoy such good sound even with my smartphone. I bought the black ones, but I found out that they have my favorite color, blue, and I really wanted the blue body, so I bought the same model in blue. I want to sell these black ones. I bought them on Amazon two weeks ago, and of course, there are no scratches or stains, but since they are used, please take a look at the pictures and consider them. Accessories include a pouch (unused), ear tips (unused), and the original box. Manufacturer's Description * Employs a brass stabilizer to enhance vibration damping. Suppresses unnecessary driver resonance and achieves high-resolution playback. * Equipped with a newly developed φ12.5mm driver that reproduces clear mid-high frequencies and rich bass. * Product design that combines excellent fit and high sound insulation. * Includes ear tips in 4 sizes (XS, S, M, L). * Dynamic type driver φ12.5mm * Output sound pressure level 103dB/mW * Playback frequency band 5～25,000Hz * Maximum input 200mW * Impedance 16Ω * Weight (excluding cord) approx. 8g * Plug φ3.5mm gold-plated stereo mini (L-shaped) * Cord 1.2m (Y-type: the length of the left and right cords is the same)