... ups to 8 hours, audio transmission distance is 10M. 5.With Bluetooth music controlling function, can control play/pause, previous/next ... mode: Built-in lithium battery; USB cable power supply. 7. With Bluetooth hands free function, built-in high fidelity chip, can ... into many device: laptop/computer, telephone.MP3/MP4… 9. With aluminum alloy material design Product parameter:Rated power:4 Ohm 3W Speaker ...