This Digital to Analog Converter enables you to convert digital audio signal from optical and coaxial port to analog audio signal from RCA and 3.5mm jack. And it equips with volume control knob to quickly adjust volume.Feature:DAC ConverterIt enables you to convert digital audio signal from optical and coaxial port to analog audio signal from RCA and 3.5mm jack, which solves the problem that your devices lack RCA and 3.5mm ports. Adjust Volume Rotate the knob to adjust the volume of audio outputted from the connected device. Good PerformanceWith built-in high performance RTOS operating system and audio chip, it supports DTS and AC-3.Wide CompatibilityIt is compatible with network player, HDTV, Blu-ray Player, DVD, PS3, XBOX360, DM500S, DM800HD, etc.Plug and PlayNo drivers required, easy to use.Specification:Support audio format: MP3, AC3, DTS, WAV, WMA, AAC, ALAC, FLAC, APE, OGG, M4ASignal Noise Ratio: 120dbStereo isolation: 80db(1KHZ)Channel unbalance: 0dbSampling rate: 32~192 KHzBit rate: 16~24 BitResponse frequency: 20Hz~20KHz+/-0.7dbTHD: 20Hz~20KHz 0.25-0.065%THD+N:1KHz 0.15%Analog output level: 2.2V Port: Optical* 1, Coaxial* 1,earphone jack* 1,L/R*1 Working voltage: DC+5VMax power current: 200mAWorking temperature: 0-70℃Working humidity: 10%-80%RH(non-condensing)Storage temperature: -10-80℃Storage humidity: 5% -90% RH(non-condensing)Item weight: 88.5g/ 3.12ozPackage size: 16.5* 10.4* 2.7cm/ 6.5* 4.09* 1.06inPackage weight: 161g/ 5.68oz Packing list:1* DAC Converter1* Micro USB Power Cable1* User Manual