... Li-on battery fashional portable USB speaker with small sizeUSB speaker *Plastic mini speaker *USB,SD,MMC card with MP3,MP4,Mobile,FM RADIO ... *Lithium battery,a remote control and change wire *Frequency :87.5-117MHZPlastic USB Speaker1.Output power ... products. 9.Built-in high-capacity lithium-ion battery 500MA,with full power to play up to 2-4 hours(the ...