1,Rechargable Li-battery 2,Mp3 player,USB/TF card 3,LED Display 4,Mini size,Easy to take 5.FM Radio,MCU system ... Mini portable voice amplifier with USB/TF and FM radio V-5*Mini size,easy to take*18W output power ... Battery, convenient and environmental*Connect computer with USB data link, used as speaker*Built-in 3" high power speaker, high sensitivity microphone*Built MCU ...