1, USB/MP3/SD/TF mini speaker. 2, Built-in MP3 decoding,USB power supply. 3. Memory play, With steel gold paint,good looking. 1, support USB /SD card /TF card music play, computer small speakers.2, Built-in MP3 decoding.3, the best 3 inches horn built-in bass system.4, bass powerful no distortion. 5,memory play, long standby time. 6,USB power supply.7, With steel gold paint,in a good looking. ...