1)High-textured aluminum metal surface facilitate outdoor, indoor use; 2)Built-in Hi-Fi high-quality and high-efficiency speaker monomer, you can still hear heavenly music even outdoors. 3)Built-in high-capacity rechargeable battery, support long play. 4)You can continue to enjoy the heavenly music when using headphones to listen to music or listen to the radio,it will automatically turn off the loudspeaker, not accessible to anyone else. 5)Headset, USB connector, Line IN and charging are use the same jack wich make the product more beautiful and simple 6)Support MP3, WMA format. 7)Support Line IN function, receiving notebook or other audio source to amplify the power.