Brand: YIN LU MEI Model: A2 Place of Origin: Mainland China Province: Zhejiang Province Color classification: silver black Time to market: 2019-09-20A2 Android 9.0 player, streaming media, dual 4497 decoding, USB DAC, PGA4311STM8S seriesAK4497x2LPFUSB processorOPA1612x2SA9227Volume chipAMPPGA4311UA with TI power supplyCustomized dual op amp X2+transistor X8Output InterfaceCoupling capacitor3.5 coaxial output, 3.5 LO, 3.5PO,Murata ceramic capacitors + Panasonic film capacitors4.4 Balance portDAC filterGain.There are 6 PCM mode filters andFour gear gain loop adjustment2 DSD filtersSignal to noise ratio.Output level valueSingle port 114dB, balance port 121dBSingle port 4.2VRMS, balanced port1KHz (no load)8.4VRMS 1KHZ (no load)Output impedanceTHD+NSingle port 2Q balance port 10Single port 0.0007%, balanced port0.0006% 1kHz (no load)USB interfaceDimensionsType-C X2 supports USB OTG output 126x74x20.5mmweightbattery306g6000mAh lithium ion batteryEnduranceCharging time7 hours4.5 hours or 3 hours