LG Stereo Headset & Adaptor & Microphone - Original LG (OEM) SGEY0005516, Black Factory original LG SGEY0005516 mutes the music, and operates in mono sound during a call! Music resumes in Stereo when call is ended. Personal Stereo headset compatible: Use your own 3.5 mm (1/8) stereo headset for a custom audio solution! Since the microphone is in the Send/ End button, you simply plug-in your headset in place of the LG ear-buds. Sleek ear-bud headset design fits snugly into the outer ear! In-line microphone/ mic reduces background noise, & increases the volume & clarity of your voice transmission. Send & End button can also initiate Voice-dial on voice-dial equipped cell phone models.