Astell&Kern AK-120 portable media player

Display: 2.4inch QVGA (320 x 240) IPS Touchscreen, Supported Audio Formats: WAV, AIFF, FLAC, ALAC, APE, MP3, AAC, WMA, OGG
Sample rate: WAV, AIFF, FLAC, ALAC : 8kHz ~ 192kHz (8/16/24-bits per sample)
Output Level: L: 1.5Vrms R: 1.5Vrms (Condition No Load)
DAC: Wolfson WM8740 24-bit DAC (High-End Audio DAC) x2
Decoding: Supports up to 24-bit / 192kHz Bit to Bit Decoding
Charging Interface: Micro USB Type-B
Interface: USB 2.0, OPTICAL IN/OUT, Headphone Out
Dimensions: 2.33 ”(59.2 mm) [W] x 3.50 ”(89 mm) [H] x 0.57 ”(14.4 mm) [D]
Weight: 5 oz (143 g)
Feature Enhancements: Firmware upgrades supported Audio Performance
Frequency Response: ±0.02dB (Condition: 20Hz~20kHz) / ±0.2dB (Condition: 10Hz~70kHz)
Signal to Noise Ratio: 113dB (1kHz 0dB, 24-bit 48kHz, No Load)
Crosstalk: -128dB (1kHz 0dB, 24-bit 48kHz, No Load)
THD N: 0.0008% Typ (1kHz 0dB, 24-bit 48kHz, No Load)
IMD SMPTE: 0.0005% (24-bit 48kHz, No Load) 800Hz 10kHz (4:1)
Output Impedance: 3ohm
Clock source
Clock Jitter: 50ps (Typ)
Battery
Capacity: 2,350mAh 3.7V Li-Polymer Battery
Continuous Playback Time: Up to 14 hours (Standard - MUSIC: FLAC, 16-bit, 44kHz, Volume 37, EQ Off, LCD Off)
Charge Time: About 6.5 hours
Memory
Built-in Memory – 64GB [NAND]
External Memory: microSD (Max 64GB) x2
Supported OS - Windows XP, Windows Vista,7,8 (32/64bit), MAC OS X 10.6.5 and up