Plantronic's MX100s mobile earset is comfortable, discreet and stable. The Flex Grip design produces an exceptionally stable, comfortable fit and allows for one-handed placement in the ear. AcuSpeak technology allows you to hear and be heard in almost any environment, providing Plantronic's distinctive superior sound clarity.
Customer Reviews of Plantronics MX100s Stereo Earset - Under-the-ear
Good but the sound quality is poor9/13/2013
It is a good earphones and fits good on the Ear but it has poor sound quality. I brought this ear phone for temporary use and it served well. I use them when I'm exercising so I wouldn't care if it breaks. The quality is not the best. If the sound quality of headphones is important to you then I would move on.