UP TO 16 HOURS OF MUSICAL FUN - Built in upgraded lithium polymer battery, Flame wireless earbuds deliver up to 16 hours of superior audio performance/talk time after just 2 hours of charging enough to power your intense workout with music all day. And it will show the remaining power of the headphone battery on your phone screen. (Note: Please use the charging cable provided on the package) Immersive Sound With Powerful Bass: With 11mm dynamic drivers, built-in cVc6.0 noise-cancelling microphones, and an SBC and AAC audio chip, Flame Wireless Sports Headphones deliver fantastic sound quality with powerful bass and crystal clear voice calls at any volume. Choose the appropriate ear tips (XS/S/M/L) to get a better waterproof and listening experience for intensive workouts. COMFORT & SECURE FIT - With a lightweight, ergonomic design, Flame Wireless Sports Headphones are a great combination of comfort and stability with an ear hook and in-ear fit designed for intense outdoor or home workouts. IPX7 Sweatproof, Born for Sports: With IPX7 waterproof shell and nano-coating inside, the Flame Running Earbuds can repel sweat and heavy rain and are suitable for intense workouts and all weather conditions. Sweat-wicking headphones perfect for workout, running, jogging, hiking, yoga, exercise, gym, fitness, travel, climbing, cycling, etc. Fast and Stable Bluetooth V5.0 Connection: Flame Bluetooth headphones adopt Bluetooth V5.0 technology for a more stable connection and stronger signal transmission. It supports various devices and you can stay connected to 2 devices at the same time. Compatible with almost Bluetooth devices like PC, phones, etc.