PREMIUM HANDS FREE HEADSET with BOOM MIC 2.5MM for SAMSUNG i760, U410, M300, U540, U340, U620, U520, M500, U700, U470, U900 / MOTOROLA V365, V323, V325, Q9M, Q, E815, C290, W375 / PANTECH C3B, PN-820, PN-215, C300 / LG VX8350, VX8700, VX9400, VX9900, VX5300, VX8300, LX570, VX8600, RUMOR, VX5400, VX1000 VOYAGER, VENUS VX8800 / BLACKBERRY 8830, 8700, 8800, 8703e, 7100, 8100 PEARL, 8820 / SIDEKICK 2, 3, ID, SLIDE / PALM TREO 680, 700, 700WX, 755P, 650 / SANYO KATANTA, 3200, 7050, M1, S1 CELLET Silver 2.5mm Universal Ear Piece with Boom Mic Crisp Clead Audio Comfort & Privacy Unidirectional Microphone On/Off Switch will Function on Phones that support the Features