We have owned, scrapped or lost Motorola, Nokia and "better" Motorola ear buds with poor reception and mediocre audio. Also, the Motorola do not link well to samsung phones. Then we purchased 2 Plantronic 510's! Incredible. Easy to link, easy to fit to ear, fabulous audio (volume, clarity - voice and hearing). Great battery life and easy features for answer and redial . This is how technology should work. The safety in using in car is first rate since no fiddling is neccessary. Wonderful product. We were concerned about the size of the ear piece behind the ear, but it is a non issue.