1,Rechargable Li-battery 2,Mp3 player,USB/TF card 3,LED Display 4,Mini ... FM Radio,MCU system Mini portable voice amplifier with USB/TF and FM radio V-5*Mini size, ... frequency and music playing information.*MP3 by TF Card, USB flash disk supported, FM Radio Function*Built-in 2pcs ... 1100mAh Lithium Battery, convenient and environmental*Connect computer with USB data link, used as speaker*Built-in 3" high ...