Dual-driver acoustic architecture Crystal-clear sound so you can hear the tiniest details Featuring a 12.4 mm ultra-large titanium-coated diaphragm with a 5.5 mm micro piezoelectric ceramic unit, the dual acoustic drivers work in harmony to deliver dynamic, clear and captivating melodies with ample detail. Four built-in EQ sound effects and one custom EQ The four built-in EQ sound options include standard, enhance bass, enhance voice and enhance treble. You can also customise your own. Sound ID custom sound environment* Tailor to your preferences With Sound ID personalised sound testing and tuning, sound effects are customised to each individual's hearing and taste to create a tailored auditory experience effortlessly.