Cootree C250 Lightweight Sweatproof Earbuds Wonderful design: The Combination of in-ear and stable Behind-the-head cable design provides the advantages of better noise reduction, more comfortable listening and more stable wearing Triangle-like appearance design provides you a fashion and unique look Super lightweight,stable and portable design makes it comfortable to wear for a long time and use on the go or doing sports The sweatproof rubber ring brings you out of the worries about headset damage and provides great sweatproof function when doing sports. Up to 8 hours talk time and 200 hours standby time. If your head is too big, please be cautious before purchasing