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Feature

HiFi Headphone AmplifierSupports most headphones of high impedance 16-500, signal-to-noise ratio> 100Db, THD + N = 0.0003%, fully filter noise, output remarkable sound without distortion.
USB DAC Decoding ChipsES9018K2M DAC professional chip decodes high sampling rate formats with a high signal-to-noise ratio and low distortion, perfectly compatible with all versions of iOS and Android device.
Support DSD/PCM FormatDecoding SNR: 119dB 16-24bit/ 44.1-192kHz DSD64-DSD128Dop DSD64-128 (native), supports decoding of more formats with outstanding performance - decoding up to 192kHz/24bit PCM as well as up to DSD64.
Gain SwitchGain switch for matching output to headphone power needs. Gain: 0dB - 8.8dB. Output Power: 250mW in Impedance 16. Adapted Headphone Impedance: 16-150
Excellent Details1500mAH Lithium Battery supports headphone amp working over 8 hours; Volume control knob for volume adjustment; Charging Indicator for power checking.