1.The wireless earbuds support Bluetooth 5.1 technology, which is stable connection. After successful first pairing, just open the lid of the charging case to auto-reconnect to your Bluetooth-enabled devices of smartphones, tablets, computers, laptops, etc. 2. Use a 5V/1A charger and use the included TYPE-C charging cable to charge the charging box. Charging status, the red indicator light of the charging box is flashing. After charging is completed, the red indicator light of the charging box remains on for a long time. 3.Digital LED display is to show the power level for charging case and wireless earphones. When you put earbud wireless bluetooth into the case, bluetooth earphones will start to be charged. Headphones wireless bluetooth can last for 5-8h playtime from a single charge and 18-22 extra hours with charging case. 4.The pocket-sized charging case does not take up space to carry. Earbud wireless headphones are designed to fit the contours of the human ear with a curved structure that is same to the shape of the ear canal, making them comfortable to wear and not falling out when running, gym. 5.Features with touch control sensors, wireless bluetooth headphones allows you to conveniently play/pause, skip songs, answer/hang up, adjust volume and access other functions at the touch of a button. Free your hands when you’re busy doing exercise, driving or running.