M03 3.5mm In-Ear Super Bass Sport Running Protable Piston Earphone Headset with Microphone Features: 11.5g Providing light wearing experience Vacuum Sputtering body 99.99% Oxygen-free Copper Wire Going through repeated shakedown test and optimization for 15 months Specification: QM03 Style In-Ear Plug type 3.5mm Driver Element Moving Coil Rated power 1mW Cable material Enamelled copper wire Frequency response 20Hz-20KHz Sensitivity 102 dB Speaker Impedance 13 OHM Length Cable 130cm Body Weight 11.5g Product Standard GB/T 14471-2013 Package Included: 1 x QCY QM03 3.5mm In-Ear Headset 3 x Earplugs 1 x Manual