The 2-in-1 3.5mm stereo headset with an on/off microphone and flat wire design offers high-quality sound and seamless communication. Compatible with iPhones and smartphones, it features ultra-soft in-ear silicone tips that block out noise for superior sound isolation. With a frequency response of 20 Hz to 20 kHz, a high-sensitivity condenser microphone, a standard 3.5mm stereo plug, and a sensitivity of 98dB (1V/Pa at 1kHz), this headset delivers an exceptional audio experience for both music and calls.