FiiO X1 High Resolution Digital Lossless Media Player (Blue), Frustration-Free Packaging Professional quality Texas Instrument PCM5142 DAC and Intersil ISL28291 OP amp Bright and easy to read 2" color LCD display. Custom user interface with color themes Durable lightweight aluminum chassis, metallic buttons with concentric grooves, scroll wheel of textured rubber Internal 1700mAh battery for over 12 hours of use on a full charge. Charges through micro USB port MicroSD slot that supports SDXC cards, currently up to 128GB, large enough to hold your entire music library