[bluetooth 5. 0 & tws technology] - most advanced bluetooth 5. 0 true wireless headphones. the built-in high-quality sound chip provides you with the crystal clear high & low frequencies. two interconnection pieces are creating great stereo and excellent bass surrounding sound. fast and stable transmission without tangling. | [longer battery life] - with the latest class 1 bluetooth technology, you can get 6-8 hours continuous playtime | [bfast pairing and instant set up] engineered with industry-leading bluetooth technology, these wireless earphones keep precise and undistorted connection within 33ft (10m). they instantly connect to your apple iphone, ipad, mac, android smartphones and tablets. just power them on, hold near your device and start getting lost in your music. | [ipx7 waterproof]-the nano coating inside the earbuds and charging case can make it waterproof up to 1 meter in depth for 30 minutes. suitable for sports to prevent water ingress. ideal for sweating in the gym. even wash earplugs and base. | [worry-free after-sale service] we our products with 60 days money back, 18-month worry-free and 24 hours quick reply. if you are not 100% satisfied with these earbuds for any reason, simply email us. we will do our best to make your shopping experience enjoyable.