SMSL SMSL M2 Portable Headphone Amplifier External DAC Decoder Sound Card (Black)

Performance indicators: Sampling rate: 32-96KHz (including 88.2KHz)Bit width: 16-24BitUSB transmission specifications: USB2.0, asynchronous audio transmission THD + N: DAC < 0.003%Frequency response: 10Hz - 48KHzImpedance adaptation: 8ohm - 600ohmMaximum output power: 130mW + 130mW / 32ohmDynamic range: 110dB (24Bit)SNR: DAC> 105dB amp> 100dBOutput amplitude: 2VrmsPower consumption:0.5W; size:=87 *58.5* 9.6mmWarranty: 1 year Noted : M2 don't support battery power