... /blue/green Analog amplifier, bass and treble clarity, built-in lithium battery, MICRO SD / TF card decoding playback.Play music,with high ... etc..Build-in stereo FM radioBuild-in 1450mAH Li-ion battery,support long time playUsing new technology Class D,Nice acoustic ... .Support TF card, USB devices, headphones output 3.built-in lithium battery 4.Support AUX input external audio source5.FM radio function6 ...