) Type: Adjustable earphone 2) Character: very popular, tightly fitted to ear, able to hear while moving 3) Shell Material: metal 4) Driver unit: I|16mm, 6u 5) Impedance: 32Ic 6) Sensitivity: 108dB/mW 7) Rated power: 3mW 8) Frequency response: 20-20kHz 9) Jack: stereo I|3.5mm 10) Normal Packaging: PP bag/PE bag 11) Excellent Packaging: Gift box