... ,USB/TF card 4,Mini size,Easy to take 5.FM Radio,MCU system V-5 New,Cheap Portable Mini ... Voice Amplifier with Headset Microphone Features*Mini size,easy to take* ... 18W output power, sound can cover 800sq.m*MP3 by TF Card, USB ... Lithium Battery, convenient and environmental*Connect computer with USB data link, used as speaker*Built-in 3" ...