high power and long time play: LineIn function, can connect laptop,MP3,MP4,iphone playing music. Model: YT6021. Play music, high power and long time play: LineIn function, can connect laptop,MP3,MP4,iphone playing music2. Stereo FM radio functions3. Built-in 1450MAH battery, music time can last 9 hours, state-of-art technology class D figure function, sound effect is very good Built-in Mirco SD ...