DA Converter (Main unit, fiber optic cable, power cable) 【DAC Audio Converter】This digital-to-analog converter is designed for professional audio signals and easily converts coaxial or Toslink interfaces to RCA analog audio interfaces and a 3.5mm headphone jack. 【Excellent Sound Quality】 Achieves a 192kHz/24bit audio sampling rate, and the fiber optic input supports 32, 44.1, 48, 96, and 192kHz sampling rates, as well as 24-bit bitstreams. Features one fiber optic and one coaxial input interface, and one RCA output interface. Provides high-quality stereo sound. Note: Does not support 5.1 channel signals (such as Dolby AC3). 【Volume Adjustment】 The DAC converter has a built-in professional audio amplifier chip and a volume adjustment knob, allowing for easy adjustment of the output volume. Bass adjustment allows you to adjust the bass effect. Through the 3.5mm jack, you can connect the audio output to headphones, which is ideal for bass music. - Sampling Frequency: 192KHz - Bit Depth: 24Bit - Volume Adjustment: Yes - Bass Adjustment: Yes Used for about a month.