XDUOO X3 HIFI MP3 Music Player Lossless Music Player with HD OLED ScreenSupport APE FLAC ALAC WAV WMA OGG MP3Features: Language: Chinese, English, Japanese, Korean, French, German, Russian, Polish, Thai, Indonesian Play Mode: order, repeat one, repeat all, shuffle Songs Playback: Support browsing and playback via folders, all songs, favorites and CUE sheet CUE sheet Supported: Supports splitting songs by CUE sheet and skipping through tracks within CUE sheet Gain Setting: 0dB/+6dB DAC Filter: Fast roll off, slow roll off Brightness: 1~4 level Backlight Off: 0~30 second Auto Power Off: 0~20 minute Sleep Timer: 0~120 minute Resume After Power Off: Can resume from last song before power off File Management: Support deleting file, folder, add file to favorite sheet Volume Control: 100 steps digital potentionmeter Data Transfer: Micro USB 2.0 Firmware Upgrade: Via Micro SD card (formatted in FAT32) Headphone Detection: Playback pauses on headphone disconnection; the vol will auto set to maximum on lineout connection On/off Transients: Output relay prevent on/off transientsSpecifications: Model: XDUOO X3 Operating System: Linux Battery: 3.7V/1500mAh Screen: 1.3 inch OLED srceen Storage: Support 2 pcs 128GB TF/Micro SD cards Supported Music Format: DSD, APE, FLAC, WAV, AIFF, ALAC, WMA, MP3, ACC, OGG Support Sample Rate: DSD: 2.8224MHZ Support Sample Rate: PCM: 16-24BIT/44.1K-192KHZ Output Power: 250mW(32 load) Line Output Level: 1.5V rms Frequency Response: 20Hz~20KHz (0.5dB) Gain: +6dB THD+N: 0.002% (1KHz) S/N: 112dB Suitable Headphone Impedance : 8~150 Playback Time: >8H Charge Time: Fast charge <2H, slow charge <4H Size: 105.5 x 45 x 14 mm Weight: 100gPackage Content: 1 x XDUOO X3 HIFI MP3 Player 1 x USB Cable 1 x Screen Protectors 1 x User Manual