Upgrade Version of KZ ZST The KZ ZST X is the upgrade version of KZ ZST. KZ ZST X uses the 1BA+1DD Hybrid Unit driver, which provide excellent sound.; Noise Cancelling Properly wear earbuds can isolate 28db noise sound, The sound is clean and tidy, full of sense of speed and power.; Dynamic Drive "XUN" unit Using the KZ latest dynamic drive "XUN" unit, professional-grade balanced armature, the sound transmission is clearer and fuller.; Ergonomic Wearing Design Ergonomic design and ear hook provide you comfortable wearing experience.

; Upgraded Detachable Cable It can improve the transparency, separation and sound field of earphones, make the sound bottom crystal clear.