... .FM Radio,MCU system V-5 Audio mini voice portable amplifier with USB/TF and FM radio Features*Mini size,easy to take*18W output power ... , sound can cover 800sq.m*MP3 by TF Card, USB flash disk supported, FM Radio Function*Built-in ... 2pcs 3.7V/1100mAh Lithium Battery, convenient and environmental*Connect computer with USB data link ...