Samsung OEM Wafer BlackJack i607 T809 T329 M620 Headset This headset mutes the music, and operates in mono sound during a call! 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 Send & End button can also initiate Voice-dial on voice-dial equipped cell phone models.