... technology,neodymium iron boron speaker,perfect quality sound. 5. Dual power,built in 3.7v 500mah lithium ... be used as power bank. 6. SIG certified bluetooth V2.1+EDR 7. Using for meeting,travelling,car ... teaching. Accessoriescharger 1pc,5PUSB cable 1 pc,3.5 Audio Cable 1 pc, lobster clasps 1 pc, ... battery,you can listen to music or answer call without connecting the USB cables;Before charging,please ...