Convenient stereo handsfree earphones for playing music and taking calls on your iPhone or smartphone. Incoming call switch that can start calls with just one touch even if you are playing music, and a highly sensitive microphone. Adopts in-ear earphones with excellent sound insulation. It has excellent conductivity, and is equipped with a gold-plated L-shaped plug that prevents rust and bad contact, and comes with a convenient clip that can be secured to a pocket such as the like. Adopts a Y-shaped 4.9 ft (1.2 m) cord that is suitable for connecting smartphones and audio devices with 4 sizes of SS/S/M/L.