Main Function >Intelligently play Micro SD/TF card and U disk      >Built-in FM radio, automatically search channel      >AUX input:mobilephone/PC/MP3 player etc.     >Use as flashdisk     >Support earphone output      >Built-in MP3 / WMA decoding function     >Support breakpoint marked, makes you continue the music from shut down position       Specification Loudspeaker:1.5 inches 4    Output Power:3W     Frequency Response:90Hz-20KHz    Sensitivity:80db2db     SNR:80dB    THD:0.3%    USB Interface:USB2.0, USB1.1     Product Size:1353253mm    N.W.:170g    Power Supply:External Li-battery(Nokia BL-5C) / USB    Supply voltage:DC5V    Color:Black/Red