Technical data: * Excellent sound quality and super clear sound * Beryllium alloy for faster, better and clearer sound * Aluminum alloy sound chamber design,brings you better bass performance * New balance double damping system helps to give a more pure sound effects * Made of high quality material,strain and not easy to break * With answer/end key located in the earphone for your phone * Type: 3.5mm in-ear earphone * Impedance: 16&Omega * Weight: 12g * Cable length: 1.2m * Sensitivity: 93dB * Rated Power: 3mW * Frequency Range: 20Hz ~ 20KHz Compatible with Xiaomi  Mi-3, Mi4, Hongmi, Hongmi 2 and other devices with 3.5 mm audio connector