Dual Drivers Design--- 2pcs dynamic drivers in each channel , total 4pcs drivers inside. Provide deep thick strong and smooth sound . A high level of sound isolation for immersive audio with extended bass response Detachable Cable Design--- High quality gold-plated MMCX connector between ear head and cable. so in the event cable were to fray or break, you need only to replace the cable or a new pair of ear heads. Universal in-line remote compatible with iOS and Android phones. Calling -- answer / end; Music --- play / pause / next track / back track