🎵[QUAD Drivers Technology] Each earbud has dual dynamic driver units. Four drivers in total combining with PU+PEEK composite diaphragm design deliver better low-frequency performance, clear vocals, and Hi-Res high-frequency up to 40Khz. These sport headphones esnure you enjoy HiFi music during workout or commute

🎵[16 Hours Playtime] 250 mAh battery capacity provides up to 16 hours non-stop playback, one full charge supports up to 7 days of use if you use the earphones for 2-3 hours a day and listen to music at 30%-50% volume. Let the music accompanies you when exercising in the gym, running, jogging or hiking

🎵[IPX7 Waterproof and Snug-fit] These earphones are IPX7 waterproof. Get protection against sweat and light rain when working out. Do not use for swimming and showering. Ergonomic fit 120° angle and multiple ear tips solutions ensure these in-ear earbuds are 100% secure when jogging, biking, exercising at your maximum performance

🎵[Noise Isolating and HD Calls ] The provided ear tips, especially the memory foam ear tips are specially designed to give a secure fit for the purest sound and maximum isolation from external noise. The built-in MEMS noise-cancelling microphone eliminates background noise and delivers clear sound to the other end when making calls

🎵[24/7 service] ***Contact us if you have questions regarding pairing, connection, charging, fit, sound quality or other issues. Link to contact: https://www.amazon.com/ss/help/contact/writeMessage?writeButton=Submit&subject=5&orderID=&sellerID=AHGO42D84CZKE&asin=&marketplaceID=ATVPDKIKX0DER&language=en_US