Introducing the Mcdodo Micro Star Series Stereo Lightning Earphone is a precision-crafted audio companion for iPhones, featuring a 10mm Unit Driver with a high-grade diaphragm for crystal-clear sound performance. The built-in smart microphone allows seamless switching between music playback and calls, and the earphones come in three different sizes (L/M/S) for a comfortable fit. The earphones are made of aluminum alloy/nylon and have a 32ohm digital audio sampling rate.