Product description:
It is a portable DAC and headphone amp that contains high-performance USB, digital optical, digital coaxial with OLED display to show real-time display digital information flow. For audio streamed via USB, coaxial and optical inputs, the DAC can sample the incoming signal. It can be compatible with Windows, iOS and Android system by USB, supporting up to 32Bit / 384KHz PCM signal, DSD256 signal, 32Bit / 384KHz DXD signal. External with gain, bass boost, DAC filter, and SRC functions.

Main Features:
- External 3 gears of gaining are to match different headphone
- 2 gears bass boost can meet all kinds of requirements
- The SRC adjustment and DAC filter adjustment bring different audio experience
- Aluminum-shield case helps eliminate outside interfering noise
- Compatible with Win7, Vista, Win XP, Win8, Mac OS X, iOS, Android

Specifications:
Screen: 0.91 inch OLED
Case material: Aluminum alloy
Output power: 500mW ( 32ohms load )
Bass boost: 0 / +6dB
Gain: +6 / +9 / +15dB
THD+N: 0.0025pct ( 1KHz )
SNR:112dB
Suitable earphone impedance: 8 - 300ohms
Battery: Built-in 3.7V / 4000mAh rechargeable lithium polymer battery
Battery life: More than 11h ( USB in ), more than 16h ( SPDIF in ), more than 23h ( AUX in )
Charge time: 5 hours by charger, 11 hours by computer
PCM: 16 - 32Bit / 44.1 - 384KHz, 16 - 24Bit / 44.1 - 192KHz ( Optical / Coaxial in )
DSD: DSD64 - 256 ( 1Bit / 2.8 - 11.2M )
DXD: 24 - 32Bit / 352.8 - 384KHz