Feature:1. You can easily convert the digital audio signal input from the coaxial or optical interface into an analog stereo audio signal with an RCA interface and a 3.5 mm headphone jack.2. The builtin professional audio amplifier chip and volume adjustment knob can directly drive the headphones and adjust the volume.3. The bass adjustment function can provide powerful stereo, heavy bass effects, and create a perfect environment different from the sound field.4. Eliminate noise when there is no input signal, and automatically mute it when a nonaudio signal is input. Support 192kHz 24bit sampling rate.5. RCA output interface is connected to the power amplifier system. A channel 3.5mm audio output interface, connected to headphones.Specification:Item Type: DAC ConverterMaterial: MetalSupport Audio Format: PCMResolution (1KHZ): 94DBResponse Frequency: 20Hz-20KHz-0.2dbSignal-to-Noise Ratio (SNR): -100DBTotal Harmonic Distortion (THD + N): 10Hz-20KHz 0.25-0.065%Blocked Time: 0.577FsSampling Rate: 32-192 KHzBit Rate: 16-24 bitsHeadphone Output Level (Adjust the Bass to the Maximum): 3VRCA Output Level (Adjust the Bass to the Maximum): 9VHeadphone Output Power (Adjust the Bass to the Maximum): (32) 30mWHeadphone Output Impedance: 0.8RCA Output Impedance: 450Working Voltage: + 5VMaximum Voltage: + 6VMaximum Power Consumption: 75mAWorking Temperature Range: -10-70Storage Temperature Range: -60-150Working Humidity Range: 10-80%RH (non-condensing)Storage Humidity Range: 5-90%RH (non-condensing)How to Use:1. Use optical cable or coaxial cable to connect CD/DVD and other playback devices to optical interface or coaxial interface. Use a USB cable to connect the laptop to the USB port.Note: Do not connect a USB flash drive to this USB port.2. Use RCA cable or 3.5mm audio cable to connect the decoder to the audio amplifier or headphones.3. Use a USB cable to connect the DC 5V power connector of the decoder to the power source.4. Use the knob to adjust the volume appropriately.5. According to your preference, adjust the bass component appropriately through the knob..Package List:1 x DAC Converter1 x User Manual1 x Power Cable1 x For Toslink Cable1 x USB Data CableNote:1. This DAC supports digital PCM audio format. Before using PLS, please set your digital audio equipment (such as HD TV, TV BOX or game console) to PCM or LPCM audio. It doesn't support for DTS Dolby AC3.2. PCM setting path: device homepagesystem settingimage and soundvoice settingdigital audio outputPCM3. It is suitable for Samsung or for LG TV. If you want to connect them, please follow the steps belowSettings:A. For Samsung TV setting path:PCM format: SettingsSoundExpert SettingsAudio FormatPCM.External speakers: Settingssoundselect speakersoptical.B. For LG TV setting path:PCM setting path: menuall settingssound outputopticaldigital sound outputPCM.If you need to synchronize the output of the TV speakers and the optical fiber: menuall settingssound outputoptical fiberinternal TV speaker + optical fiber.4. Power charging: USB power cordseparate 5V 1A standard plugwall socket.5. Do not use the power adapter by plugging the USB cable directly into the TV (an unstable power source can cause humming).6. If the volume (from the output of the DAC) is not loud enough, please connect the output of the DAC to a lowimpedance mobile phone headset, headphone amplifier or power amplifier.7. It is not suitable for Netflix and for YouTube video sites.8. Before turning on, you must turn the adjustment knob counterclockwise to reduce the volume, so as not to damage your hearing!9. USB flash drives are not supported!