Special technology is used to make it produce powerful and deep bass Analog amplifier, bass and treble clarity, built-in lithium battery, MICRO SD / TF card decoding playback.Play music,with high-powered loudspeakers,long time playWith line in function,can switch-in Notebook PC,MP3,MP4,Ipnone etc..Build-in stereo FM radioBuild-in 1450mAH Li-ion battery,support long time playUsing new technology ...