?OPTIMIZED SOUND QUALITY?: Wireless earphones with bluetooth V5.0 ,built-in high-quality audio chip?deliver Superior sound quality , HD stereo sound achieving music scene surround sound. The bluetooth headphones with microphone allow you to answer the phone directly. ?ULTRA-LONG STANDBY TIME?: Wireless headphones up to 3.5-4 hours calling / music time on one charge (only 1hours per charge) , 3500mAh charging case can charge the Bluetooth headphone 15 times offering up to 60 hours of longer total playtime. ?FAST AUTOMATIC PAIRING & Smart Touch Control?: Completely automatic system , easy to pair .Answer and hang up calls or access other functions by touch on the earbuds, Also supports Siri, Music Play / Pause, Volume Up / Down, Simple and Convenient to Use. ?SNUG AND COMFORTABLE DESIGN? bluetooth headphones wireless are designed to comfortably fit in your ear (in-ear design). Light and comfortable to wear for long hours with no pain. Offer four adjustable sizes silicone eartips (S, M, L XL ) ?WORRY-FREE AFTER-SALE SERVICE?IPX7 Waterproof easily resist sweat and water. It's absolutely ideal for gym, sport .?24 months professional after-sales and 90 days 100% full refund policy?. Please feel free to contact us if you have problem or need any help.