Topping NX4 DSD Portable Headphone Amplifier Earphone, HiFi Digital Stereo Audio Mini AMP High-Res, Black

SpecificationDSD:PCM768ïŒDSD512DSD:Native,DOPAnalog input:1 x 3.5mm(share with analog output)Analog output:1 x 3.5mm(share with analog input)Headphone output:1 x 3.5mmPlayback time:Approx 28 hours (only headphone amp)Approx. 7.5 hours (USB DAC + headphone amp)Headphone output: 293mWDistortion: 0.0009% (140mW)Gain: 0dB.8.8dBNoise floor: 2.5uV 6.5uV293mW x 2 @ 32Ω114mW x 2 @ 300ΩDecoding SNR: 119dB16-32bit / 44.1-768kHZ DSD64-DSD256Dop DSD64-512 (native)Net weight:Approx 155g (unit only)Dimensions:Approx 11CM x 6.8CM x 1.4CMSuitable Headphone Impedance:16-300Ω