The Green Lion Stereo X90 3.5 mm Wired Earphone offers excellent sound and comfort. They have a good, sturdy build with TPE + metal but are still light in weight. The earphone has a 10mm speaker to produce good sound with an impedance of 32? and a sensitivity of 102±3 dB for a marrying experience in sound. Its sturdy TPE cable is 120±3 cm long and equipped with a 3.5 mm aux connector to give good reliability in terms of connectivity and decent movement. Enjoy hands-free talks while changing your volume easily, and the in-ear design will fit snugly and comfortably for those long-winded listening periods. Perfect for every music lover and daily use. Specification Material: TPE + Metal Speaker: 10 mm Impedance: 32? Sensitivity: 102±3 dB Connector Port: 3.5 mm Aux Port Cable Length: 120±3 cm SKU: GNSTX90W3BK | GNSTX90W3WH Features Hands-Free Calls Comfortable To Wear Volume Control High Quality Sound In-Ear Design