[More Impressive Sound Quality]- CCA CRA + adjust the speaker structure from new molding, to achieve the better improvement & extraordinary hearing experience from the F1 ( first formant frequency). From CRA+ tuning, bring you stronger bass, wider frequency response and shocking soundstage to treble extension [configuration]- CCA CRA+ uses an entirely new definition of dynamic, combined with a variety of outstanding acoustic tuning technologies: patented ultra-thin polymer composite diaphragm, 0.15mm magnetic gap benefit to the lower distortion rate, and 0.035 MM diameter loop achieves the stable & efficient driver vibration frequency [Light & Comfortable Wear Experience]- Ergonomic cavity structure, lightweight cavity with auricle PU memory hook, effectively reduces the pressure on the ear, even if wearing for a long time without pressure. Provide a stable and comfortable wearing experience [Good Quality]- CCA CRA's cavity is made of metal with high quality transparent resin, which is fashionable and solid. At the same time, using a new balance line, with lower impedance, better transmission the OFC double line parallel cable effectively makes the tangle and knot resistant, and it is more solid and has a longer usage life [Pro-Grade Performance Gift]- Loved by musicians and audiophiles! Studio-accurate sound reproduces every detail—ideal for recording, gaming, or immersive movie nights. The gift for anyone who craves premium audio Specifications Model: CRA+ Pin type:0.75mm Cable length: 120±5cm Plug Type: 3.5mm Impedance:23.5Ω Frequency Range: 20-40000Hz Sensitivity: 111dB±1dB