[TWS Technology & Noice Reducation] Bluetooth 5.0 and lossless HD rendering technology that produce incredible sound quality with deep bass and ensure your great experience with fast, stable and efficient transmission. [One Step Pairing & Build-in Mic] One-step pairing and it will automatically connect to its memorized phone when power on next time. With the built-in mic, you can answer your phone with one click on the ear bud. [90H Playtime, with Charging Case] Built-in 2000mAh rechargeable battery charging case, wireless earbuds can play for 4-5 hours on a single charge, portalbe charging case can recharge the earbuds 18 times after a single full charge, provide total 90 hours playback. [Confortable Fit & Sweat-Resistant] Fit perfectly for different kinds of ears with 3 different size sets of silicone ear tips. Resistant to sweat, water and rain, this lightweight sport earbuds can always stay snug whatever sports you are doing, ideal for sweating it out at the gym.