MCU: Rockchip RK3188
Display: 3.65” 845x480 TFT touch screen
DAC: ESS9018K2M
Op-Amp: OPA1622 x 3
Storage: 32GB + TF (upto 256GBx2)
Headphone: 3.5mm + 2.5mm (Balanced)
Line: 3.5mm (shared)
Digital: Coaxial, USB Audio (in/out)
USB: Type C (2.0), charging, OTG
System: Custom Android 5.1
RAM: 1G DDR3
Wi-Fi: 802.11 b/g/n 2.4GHz
Bluetooth: BT4.0
Battery: 3000mAH
Duration: ~12 hours
Charging: ~3 hours (2.1A)
Dimension: 115*57*15.3 (mm)
Weight: ~150g


Phones Out (Single-ended)
Power rating: 130mW+130mW (@32Ω)
Frequency Response: 20-20kHz (±0.2dB, Fs=192kHz) 5-50kHz (±1dB, Fs=192kHz)
THD+N: 0.002% (1kHz, Fs=44.1kHz;20Hz-20kHz, A-Weighted)
Dynamic Range: 116dB (20Hz-20kHz, A-Weighted)
SNR: 116dB (20Hz-20kHz, A-Weighted)
Channel Separation: 76dB
Output Impedance: ≤0.4Ω
Connector: 3.5mm TRS (shared with Line Out)

Phones Out (Balanced)
Power rating: 250mW+250mW (@32Ω)
Frequency Response: 20-20kHz (±0.2dB, Fs=192kHz) 5-50kHz (±1dB, Fs=192kHz)
THD+N: 0.002% (1kHz, Fs=44.1kHz;20Hz-20kHz, A-Weighted)
Dynamic Range: 117dB (20Hz-20kHz, A-Weighted)
SNR: 117dB (20Hz-20kHz, A-Weighted)
Channel Separation: 92dB
Output Impedance: ≤0.6Ω
Connector: 2.5mm TRRS

Line Out
Output Level: 2.0V (@10kΩ)
Frequency Response: 20-20kHz (±0.2dB, Fs=192kHz) 5-50kHz (±1dB, Fs=192kHz)
THD+N: 0.003% (1kHz, Fs=44.1kHz;20Hz-20kHz, A-Weighted)
Dynamic Range: 116dB (20Hz-20kHz, A-Weighted)
SNR: 116dB (20Hz-20kHz, A-Weighted)
Channel Separation: 92dB
Imp. matching: ≥10kΩ (suggested)
Connector 3.5mm TRS (shared with Phone Out)

USB Audio Output
DSD Mode: DSD64/DSD128, DoP or D2P*
PCM Mode: Upto 24Bit/384kHz

S/PDIF Output
DSD Mode: DSD64, DoP or D2P*
PCM Mode: Upto 24Bit/192kHz convert higher resolution to 176.4kHz or 192kHz
Recommended Headphone: impedance Range 16 - 200Ω (recommended)
*D2P: DSD to PCM, always output at 24bit/88.2kHz

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