In-ear headphones. Ergonomic Version Of Our Award-Winning Piston Classic -oblique angled ear fittings naturally match your ear canals. 3 sets of included ear tip sizes ensure a proper fit for all. They’re more comfortable and less likely to fall out, freeing you to enjoy your music. Dynamic Driver-dual layer composite driver with aerospace grade titanium delivers sizzling highs, present mids, and powerful bass. Tuned By A Grammy® Winning Sound Engineer - 1MORE collaborated with internationally acclaimed sound engineer Luca Bignardi to perfect the final tuning to deliver a precise representation of your favorite artist’s intended sound. Android™ and iOS Compatible MEMS Microphone -in-line microphone compatible with Apple® (iPhone/iPad) and Android™ allows you to take calls without cross-talk or background static. CONTENTS: In-ear headphones 3 sets of silicone ear tips of various sizes. TECHNICAL DETAILS: Frequency Range: 20-20,000 Hz, Plug: 3.5 mm Gold Plated, Weight: 13g, Color: Gray.