SONY IER-Z1R Flagship Earphones Hi-Res, Removable Cable, Balanced Connection Compatible Sony Signature Series Includes the main unit, box, leather case, ear tips, 3.5mm cable, and 4.4mm cable. Used mainly indoors, connected to devices like the NW-WM1ZM2 and NW-ZX707. This is SONY's top-of-the-line model, and I believe it provides a very beautiful sound. Playback and removable cable functionality have been confirmed. There is a crushed corner on the outer box, and the ear hook part of the cable is sticky. Quoted from the official website: Hi-Res stereo earphones capable of reproducing ultra-high frequencies up to 100kHz. Features a vast sound field and realism that are difficult to experience with conventional in-ear models. Equipped with a "HD Hybrid Driver System" that combines three different driver units assigned to low, mid-high, high, and ultra-high frequency bands. The "Refined Phase Structure" meticulously adjusts the sound transmission path, reproducing the original tones of instruments and vocals, and achieving a sense of sound separation. Brand: SONY Wearing Style: Both ears, integrated left and right Earphone/Headphone Type: Canal type Structure: Sealed type Color: Silver系 (Silver-based) Wireless/Wired Connection: Wired connection Earphone/Headphone Features: Hi-Res, Removable Cable Low-Frequency Response (Hz): 3 Hz Impedance (Ω): 40 Ω Sound Pressure Sensitivity (db): 103 db Drive System: Hybrid type Plug Shape: Mini plug Driver Size (mm): 12 mm Cord Length (m): 1.2 m Weight (g): 26 g #SONY #Sony #Earphones #Headphones #HiRes #IER #Z1R #BalancedConnection #RemovableCable #Walkman #WALKMAN #NW #WM #XBA