KBMP3 is itself a single-chip highly integrated digital music system. Base on King Billion's DMCUTM core technology, KBMP3 can afford a unified, cost-effective platform to perform all kinds of digital music decoder with a lot of functions accompanied. The high quality sound play back, performed by King Billion's proprietary class-D headphone amplifier technology, gives the best auditory sensation superior to the traditional class-AB ones. KBMP3 also supports many standard memory devices to be its external data storage media, and, through the high speed USB2.0 interface, even volumes of data download/upload can be done in a flash. The built-in digital recording capability can record long time duration of voice from microphone or stereo audio channels like FM radio. Moreover, the KBMP3 has low power consumption and allows long battery life. All these features make it the best solution suitable for portable audio devices like MP3 player.