Professional quality Texas Instrument PCM5142 DAC and Intersil ISL28291 OP amp</br>Bright and easy to read 2" color LCD display. Custom user interface with color themes</br>Durable lightweight aluminum chassis metallic buttons with concentric grooves scroll wheel of textured rubber</br>Internal 1700mAh battery for over 12 hours of use on a full charge. Charges through micro USB port</br>MicroSD slot that supports SDXC cards currently up to 128GB large enough to hold your entire music library</br></br>Product Description</br></br>The X1 from FiiO caters to music lovers who want to listen to high-resolution audio on the go. This compact lossless audio player features a Texas Instrument DAC (PCM5142) and Intersil amplifier. Plus the output jack is switchable between headphone and line out to a dedicated amplifier. The headphone jack works with in-line remote controls on compatible headsets.<br><br> <b>Pro Quality DAC and Amp</b><br> Utilizes Texas Instrument's newest PCM5142 DAC greatly surpassing the integrated DAC Chips in smartphones tablets and computers. The X1 also employs Intersil's ISL28291 for its amplification circuit.<br><br> <b>Line Output</b><br> X1 has enough power to drive headphones directly or it can be set to provide line output instead. Switching between the two is easy via a menu section. Using line output?? you can expand the X1 by bundling it with dedicated headphone amplifier such as E11K/A3 or E12.<br><br> <b>Complete Format Support</b><br> The X1 support the major lossless music formats?? APE?? FLAC?? WAV?? WMA?? ALAC??