1)Built-in auto-research FM function,with this you may enjoy music in case there is no audio player. 2)Electronic volume control will have the reproducing sound be more clear and exquisite. 3)With the stylish folding desigh,the portable active speaker system with FM scan radio delivery amazing sound with ample volume and aslo it can fit in with MP3,CD players ,MD,iPod and etc. 4)The speaker is used highly efficiency ,internal magnet and double Rb.iron borons as the magnetic circuitry system,completely improve the speaker's sensitivity,which means magnetic -proof. 5) There are three ways to give power,internal 4*a AAA batteries,external USB cable,externally AC/DC 6V/1A.It will play 18 hours continuously when used with 4* AAA batteries.