Hi up for sale is my FiiO X3 am also including a 32MB Sandisk Ultra with it. If you are looking at this ad then you probably already know what it is. I bought it new 3-4 years ago. The sound is fantastic. Has a built in DAC so you can use it with your house amplifier through a line out output. It also has an amplified line out for headphones in case you want to use it as a mobile player. I believe it will also work as a DAC for a computer through USB but I've never tried it. This unit is no joke it sounds amazing. Just bought a higher end DAC and laptop to use as my DAP so this is up for grabs. It will play DSD, WAV, WMA, ALAC, FLAC, APE, AIFF, MP3.... Comes with protective black rubber sleeve. Uses a Cirrus Logic CS4398 DAC, will play 24-bit/192kHz. https://www.soundvisionreview.com/gear-gadgets/accessories/fiio-x3-2nd-generation-review/ Am firm on the price. Thank you for looking at my ad.