Brand:TRI Model: i ONE Color: black,silver Impedance: 24Ω Sensitivity: 108dB@1KHz Frequency response range: 20~40KHz Driver unit: external magnetic circuit DD Diaphragm material: Carbon PET Unit diameter: 10MM Earphone type: In-ear Cavity material: Aluminum alloy Interface: 2Pin 0.78mm (drop-in) Plug: 3.5mm gold-plated Cable material: OFC shielded pure silver wire Cable length: 120CM±3CM