The use of asynchronous CT7601USB chip + ES9018 programme to support code exclusive decoding, it is highly recommended that the use of foobar2000 playback software to push the effect is better. The use of 6 op-amp analogue circuitry, the output can be directly driven by high resistance headphones output can also be accessed for use in the amplifier, the two isolated, do not affect each other. The use of high-precision active crystal, CT7601USB chip and ES9018 decoder chip to provide high-precision accurate clock. Single power supply to dual power supply, power supply voltage plus or minus 11.5V, to effectively protect the dynamic range and thrust of the output. Ultra-clear USB audio data, support audio source code direct decoding. Strongly recommend the use of computers as a front-end playback device, and install fooobar2000 software because the computer or mobile phone system resample the audio signal, resampling has a serious impact on the sound quality, set the exclusive/source code push no longer be affected by the system, at this time the sound is no longer muffled, high-frequency details are rich in clarity, the human voice and musical instruments of spatial location, stereo sound like a better, highly recommended Oh! Product Parameter Dimension:10CM x 6CM x 2.5CM Weight:0.15KG Input Voltage:5V 2A(Type-CJack) Dynamic Range: 120dB@(1KHZ A-) Signal-to-noise ratio():120dB@(1KHZ A-) Harmonic distortion: 0.0007% ChannelCrosstalk:-95dB(@1KHZ A-) Frequency response: 20HZ-20KHZ Output Level: 4.25Vrms Output Jacks:RCAjack, 3.5mmJack Input Jacks:Type-Cjack, Bit depth:16bit, 24bit 32bit Sampling rate:PCM44.1K-384K,DSD64-256 Note:Due to different production batches, the printed words may be different, which not affect the use. Colour:As Shown Material:aluminum alloy Package Contents: 1 * Digital Audio Decoder 2 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.