Long battery life + dual-mode playback, worry-free useUpgraded lithium-ion battery can be charged for 2- 2.5 hours for over 10 hours of continuous playback, with 3.5 mm audio cable, it can be wired directly to the device even when it is out of battery. Bluetooth 5.2 technology stably connects to cell phones, tablets, computers and other devices, outdoor travel without fear of disconnection, worry-free battery life