1) Type: noble type, adjustable ear-fitting earphone 2) Character: tightly fitted to the ear, listening while moving ok 3) Plug material: light metal and gold-plated 4) Driver unit: 16mm 5) Impedance: 32 6) Sensitivity: 108dB/mw 7) Rated power: 3mw 8) Frequency response: 20-20kHz 9) Jack: stereo 3.5mm and 2.5mm as wish 10) Normal packaging: PP bag and PE bag 11) Genuine packaging: gift box