【HI-FI SOUND QUALITY】 Not just for music, the headphone is also great for making phone calls with family and friends. Built-In CSR chip,Strong stable Bluetooth signal.CVC6.0 noise reduction technology, reduces outside noises promote sound clarity by enhanced echo cancellation. 【COMFORTABLE WEARING DESIGN】 Built for your active lifestyle - 18°adjustable earbud fits perfectly for your right ear, bringing you brand-new wearing experience. Ergonomic design allows for ultimate wearing comfort to match your active lifestyle like running,cycling, jogging, driving,hiking, camping,working,gym exercise and other outdoor sports. 【LONG BATTERY LIFE】Up to 5 hours of talk time and music time and 150 hours of standby mode with a quick charge of only 1.5~2 hours. 【HAND-FREE CONVERSATION】 Automatically reporting in-coming phone number,you will not miss any telephone.Answer the call or reject, simply say \"yes\" or \"no\" toward the microphone, let you answering the phone with driving safely. 【EXTRA GIFT】1 x Extension Ear Piece,2-size eartips(S/L,the M ear tip is on the original hedphones),1 x Soft silicone ear hook,suitable for small ear use.The Bluetooth Headsets FOR RIGHT EAR ONLY, fits 99% size of people\'s ears.