1.Bluetooth 5.3 True Wireless Design: The bluetooth earbud employs the most advanced Bluetooth 5.3 technology to give you the listening experience. 2.Fit and comfort Design, IP7 : The C16 bluetooth earphones are good performance running headphones for the gym because they stay securely in place, aimed at fully fitting your ears without falling out even for workouts. 3.40H Playback, Dual LED Display: If you want to worry less about your true wireless earbuds battery life, our c16 is a solid pair of sport earbud available. In ear headphones can last 8H playtime on single charge. 4.HD Stereo Audio, Clear Call: C16 earphones with microphone adopt a 6mm composite diaphragm and unique stereo design, delivering powerful bass and stunningly clear vocals. The microphones are remarkably good at reducing moderate wind noise, delivering stellar clarity for phone calls and video chats.