Dynamic driver: wireless audio featuring hd hybrid driver & aptx, for accurate high-resolution audio quality usb c fast charging: enjoy up to 1.5 hours of music playback on just 10 minutes of charging water & sweat resistant: comfortable, has been certified ipx6 which has been tested to be able to withstand water pressure. can be used in all fields without fear of damage due to wet. and it is also soundproof from outside noises. comfortable design: redesigned ear tips provide stability when you are doing your activities using the earbuds, and create a soft lock on your ears, and are also able to isolate outside noise