Qualcomm aptXHD audio Stereo Sound: Mpow Flame S features high fidelity stereo sound with advanced QCC3034 Chip and 11mm dynamic drivers to catche every detail of the music and transmits rich sounds, ensures a crystal-clear listening experience for both phone calls and music. The ear buds come in 4 sizes and please choose the most suitable ones for the best user experience. Mpow flame features bass+ sound for an immersive listening experience. Up to 12 Hrs Music Enjoyment: Adopted newest Bluetooth 5.0 technology, Mpow flame2 has lower energy consumption and provides 12 hours playtime, 300 hours standby time. It only takes 2 hours to be fully charged. Besides, you can check the battery status on your phone. Optimum Comfort & Secure-fit. 1.Flame S is a great combination of comfort and stability with ear-hook and in-ear fitting designed. 2.The upgrade of the headphone cord material makes it lighter and more skin-friendly.3.The ear buds come in 4 sizes of silicone ear buds and 1 size of memory foam ear buds for perfect fit. IPX7 Sweatproof for Sports. For many years, Mpow has been committed to providing outstanding sound for workouts. Flame S makes a ideal companion in exercises since nano coating can fend off sweat in strenuous workouts and all weather conditions. Great Performance When Taking Calls: Flame S is engineered with Qualcomm cVc8.0 Noise Cancellation microphone to better filter out background noise and capture your voice even when you are taking calls while driving, cycling and running. Besides, It also supports dual-connection so you can stay connected to 2 Bluetooth devices at the same time.