... 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, sound can cover 800sq.m*LED Display:It can display the battery status,radio frequency and ... guiding, Morning exercise, Training, Sports, Speech,Publication,Outdoor entertainment mini portable voice amplifier with USB/TF and FM radio V-5