Astell & Kern Limited Edition Super Junior MP3 player, in used condition can take more photos on request. The box is worn, and the MP3 player shows signs of use EXCEPT on the autograph area that is practically pristine! Information below is the specs from the official website Astell & Kern AK Jr 64GB Hi-Res Super Junior.A collaboration with K-pop group Super Junior, the Super Junior x AK Jr digital audio player packs Astell&Kern’s renowned high-resolution sound into a slim, lightweight package. The sapphire-blue aluminum body measures just 8.9 millimeters thick and features a 3.1-inch LCD touchscreen where you can view, pause, and skip tracks. Despite its compact size, this unit can drive more demanding full-size headphones, like the Sennheiser HD 600. Along with being a great portable DAP, it works well as a portable DAC, equipped with the highly regarded Wolfson WM8740 and USB DAC compatibility. The 64 gigs of internal memory is expandable to 400 gigs via the microSD card slot. Autographed on the back, the DAP comes preloaded with 20 high-definition Super Junior tracks remastered specially for this collaboration. SPECSAstell&Kern8.9mm-thick sapphire blue aluminum bodyAutographed back3.1 in (7.8 cm) WQVGA LCD touchscreen (240 x 400)Wolfson WM8740 DAC3.5 mm single-ended audio outputFront panel and volume wheel engraved with Super Junior’s “SJ” logo64 GB internal flash memory + microSD memory card slot (up to 400 GB)DSD64 (1 bit/2.8 MHz) playback supported; stereo through DoP (DSD-to-PCM conversion)USB DAC compatibility