The three world first of Pocket HIFI

The first portable player can play the audio files of 24 bit/192 KHz.
The first portable player whose jitter less than 5 picoseconds.
The first portable player can promote a 300 ohm earphone.

Regius walnut: black walnut in North America

The outer casing material of the Pocket HIFI C4 player is made of the black walnut in North America. The black walnut had been called regius walnut. The pleasant vignette is formed by the clear, smooth glossy and wavelike grains and the clear annual ring. It provides each music fan a unique player.

Precision: it is manufactured manually.

Wan’s team adopted to process the wood by the CNC numerically-controlled machine in the constant temperature and humidity workshop. The design and the special curve on the wood were engraved manually.

Playable Formats: WAV, FLAC, APE, OGG, MP3 
SNR: 108dB 
THD: 0.0022% (15kHz,-90dB);0.04% (1kHz, -87dB); 0.014% (15kHz, -76dB) 
Crosstalk: >75dB (32 Ohm load) 
Internal Clock Jitter: 1.5ppm 
Jitter at SP/DIF Output: 2ps
Memory: 16GB Flash (Total built-in - will be less due to formatting as with normal memory and hard-drives) 
Memory Card Slot: Mini-SD up to 32GB Analog 
Outputs: 3.5mm (up to 125 Ohm) and 6.5mm headphone sockets / jacks (up to 300 Ohm or more - many customers are successfully using 600 Ohm headphones) , both active at the same time. 
Analog Output Voltage: 2V maximum at 6.5mm socket (can deliver up to 13.3mW); 620mV maximum at 3.5mm socket 
Digital In: Coaxial SP/DIF Digital Out: Coaxial SP/DIF ADI AD823 chip (Op-amp) Cirrus Logic CS4398 DAC chip (Analog Digital Converter) Cirrus Logic CS8422 SRC chip (Sample Rate Converter) TCXO high-precision crystal oscillator ALPS Pro Audio Series slider level / volume control
Display: OLED 2.4" (6.1cm), 320 x 240 pixels
EQ Options: Normal, Bass, Classical, Rock, Pop and Jazz Firmware updatable via Colorfly website.
Size:124 x 72 x 20 mm (Approx) 
Weight: 259g (Approx.) 
Battery: Internal 3.7V - (approximate play time 6 to 8 hours depending on format and sampling rates)
Charging time: normal charge approximately 4 hours; 
maximum charge approximately: 24 hours 
Battery Charger: Supplied, 100-240V AC, Australian/US Plug 
Wooden Housing: Black Walnut