The gold Fiio X1 Portable High Resolution Lossless Music Player is a pocket-sized audio player with a built-in Texas Instruments PCM5142 DAC chip and an Intersil ISL28291 chip. The player supports five lossless audio formats including APE, FLAC, ALAC, WMA and WAV. The player has a microSD card slot that supports up to 128GB of memory expansion. The built-in rechargeable battery recharges via USB and provides up to 11 hours of continuous playback. The player is also equipped with a 2" TFT color display with adjustable brightness.