I use these with my Samsung M510. They have an effective range of about 10m. TThey are the over the ears, behind the head variety and stay well connected when your are moving around. The sound quality is good but is best in quiet environments because they do not make a good seal with your ears, though this can be an advantage if you need to hear sounds in the environment like when you are bike riding and need to hear cars. They do become a bit uncomfortable after a few hours.