Baseus Encok Wire H04 provides high quality, clean, natural sound. The intrinsic design allows you to adjust the size of the inserts. It is equipped with a remote control enabling volume control, switching tracks and receiving telephone calls. Product Specification: Material: aluminum alloy + TPE Length: 1.2 m Frequency range: 20Hz - 20KHz Compatibility: mobile devices with 3.5mm Jack connectors