The FiiO X3 MKII Portable High-Resolution Music Player is a portable hi-res audio player enabling you to have hi-res audio for your music. The X3 3rd Gen is part of that Infinity sound pitch of summer 2017. Alongside the F5 and the Q1 Mark II everything was about enhanced portability and the inclusion of a balanced output or cable capability. The X3iii is no different in that respect with a balanced output to match up with the F5 F9 or F9 Pro. FiiO is pitching the balanced output as enhancing the X3s staging and detail performance over the unbalanced output. Second-Hand : This product may have been opened for quality control purposes returned by a customer refurbished or may have non-essential parts or software missing. Otherwise the product operates as new. This is a great opportunity to buy a fully functioning product at a discounted price.