Generic 10DD HiFi in-Ear Monitors Headphones Wired IEM Dynamic Earphones HiFi Stereo Earbuds for Musician/Audiophile Detachable 0.78 2 Pin Cable 3.5mm Jack (Without Mic), XUAN10DD

[6 Dynamic Drivers] 3 dynamic drivers on each side,9mm dynamic driver *1 and 7mm composite dynamic driver *2 ,The composite dynamic driver is a double coil structure, which improves the sensitivity, better matches with the 9mm DD, makes the sound of the earphone better and more balanced, saves the space of the earphone, and is more comfortable to wear.