Noise Cancellation Microphone Included Bluetooth 5.1 technology, one-step pairing - ensure your great experience with the fast, stable and efficient transmission. Take the left and right Bluetooth headphones out from the charging box, then "TWS5.0" automatically appears on your smartphone. Keep your mind rest on calls or music without worrying about Audio dropouts. 24+ Hours of combined Play Hours: These TWS earbuds come with a 2000mAh battery to give a combined 50hrs of playtime so that you can jam, chat and binge watch for a whole week on a single charge.