[Adopted Qualcomm Chip] In a flooded market of the truly wireless earbud, it is really hard to stand out. You have to bring some unique features to the table. The chip we use in the earbuds is Qualcomm QCC3020, it's the most advanced TWS earphone chip there is. Which means the most stable signal connection, better sound quality, lower power consumption. [aptX / CVC 8. 0 Noise Cancelling technology] Thanks to the Qualcomm aptX/CVC audio technology, OFUSHO earbuds will allow you to enjoy perfect 3D stereo sound quality. You will soon hear the difference between our most advanced earbuds and ordinary earbuds. [8 hours continuous playing TIME] The most advanced Qualcomm chips have lower power consumption, which means that the earbuds can be used continuously for 8 hours after being fully charged. This playback time is twice that of other taws earbuds. The charging case with built in 2200mAh battery could recharge the earbuds about 19 times, gives up to 152 hours of continuous music time. You will never worry about running out of power. [Secure Fit / IPX7 Waterproof] We tested the earbuds with over 100 unique human ears to create an incredibly ergonomic and comfortable design. Enjoy all day listening comfort with soft, snug earbuds that perfectly fit your ears. The sealed shell and interior Nano coating can easily repel sweat and rain, making the headphones good for outdoor sports and long workouts. [Easy to Use] They will be automatically turned on and paired with your device as soon as you take them out of the charging case. Very simple to use. [1 Year ] if you have any problem please contact our customer service to get help.