DP-S1 Digital Audio Player Audio Features: High-Resolution Audio, Balanced Connection, DSD Native Playback. The microSD memory card slot supports microSDXC memory cards up to 200GB. With two slots, you can expand the capacity up to 416GB including the internal memory. There are no issues with the charging function. Supported Playback Formats: MP3 (44.1 kHz/48 kHz), AAC (44.1 kHz/48 kHz/96 kHz) FLAC/ALAC/WAV/AIFF (44.1 kHz/48 kHz/88.2 kHz/96 kHz/176.4 kHz/192 kHz) ※ MQA, DSF/DSDIFF (2.8 MHz/5.6 MHz) ※Files protected by DRM cannot be played. The main unit has been initialized. Earphones: Pioneer SE-CH5BL, φ2.5mm 4-pole balanced terminal. Three sizes of ear tips (S, M, L) are included. Also, a CREATIVE EP-650-CR (closed-back) earphone will be included as a bonus. This has a φ3.5mm 3-pole terminal. Only size M ear tips are included. It's still going strong and producing good sound. Both items were in use until recently. Usage frequency was low, and the condition is good, but please understand that these are used items before purchasing.