Size 4-5

Twist Lock Technology keeps your headphones secured with a simple twist; Once in place, the earbuds are ‘Locked’ into place and won’t wrangle free even during the most strenuous of exercises
Personally Sized to Fit Your Ear Soft Silicone for Comfortable Fit Double 4 Foot Cord
15mm Speaker, Dynamic driver, 20Hz-20kHz frequency response,