Sony Stereo Ear Receiver [SONY E0931] ● Employs 300kJ/m3 high-power neodymium magnets to enhance sound resolution and reproduce clear mid-high frequencies and powerful bass. ● Elastomer resin cord that resists tangling when carried around. ● Long bushing to prevent cord tangling and breakage. Specifications ● Type: Open-air dynamic ● Driver Unit: 16mm diameter (CCAW voice coil adopted) ● Sensitivity: 108dB/mW ● Magnet: Neodymium ● Frequency Response: 10-23,000Hz ● Impedance: 16Ω (1KHz) ● Maximum Input: 100mW ● Cord Length: Approximately 1m OFC litz wire ● Cord Type: Asymmetrical U-shaped neck chain type ● Input Plug: Gold-plated straight micro plug ● Weight: Approximately 6g These lightweight and small earphones sound quite good, and I liked using them for my train commute. However, I stopped using them when I started commuting by car, so they have been stored at home. They are in excellent condition with little use. However, there is a 1mm tear in the ear pad on the right side, but it should not cause any problems when using them (Photo 6). When listing, I cleaned them with alcohol disinfectant wipes and air blow, so you can use them comfortably. A new pouch that opens and closes with one touch, convenient for storing earphones, is included (Photos 12, 13). Shipping will be on days other than Tuesdays and Thursdays.