Activate the wireless headset without pressing any buttons. These Bluetooth earbuds can be turned on automatically and paired after being removed from the charging case. At the same time, they can also automatically power off and charge after putting back the charging box. Built-in extraordinary 350mAh battery base, 40 mAh battery headset, and high-efficiency power chip in Bluetooth headset. Up to 4-5 hours of playback time on a single charge. Although the smart charging box can be charged 8 times after being fully charged, the total playing time can last up to 40 hours.