1) Type: necklace earphone 2) Perform: popular lines, comfortable and elegant; highly accurate sound-reproduction, enhanced bass and noise-isolating 3) Plug Material: light metal 4) Driver unit: 10mm 5) Impedance: 32 6) Sensitivity: 108dB/mW 7) Rated power: 3mW 8) Frequency response: 20-20kHz 9) Inserter: stereo 3.5mm and 2.5mm as wish 10) Normal Packing: PP bag and PE bag 11) Excellent packaging: gift box Currency: RMB Unit Price: 32 Quantity: 2000