🎧Design concept: This product is suitable for desktop PC HiFi music playback, video playback, and games. The hand-feeling volume knob can be used to adjust the volume when playing games or watching video programs or listening to songs, No need to use the mouse to adjust the volume This knob can directly control the volume of RCA output control, which is rare in other products. Perfect for Music and Gaming, When you use it for music, it can bring you fantastic music enjoyment. | 📯A variety of input and output modes: Amplifier can be PC-USB(Support OTG), optical fiber, coaxial three inputs, can be connected to TV set-top box, DVD, DCD,PC,Mac,Phone(OTG); output mode has RAC Can be connected to the power amplifier, tube vacuum amp, active speaker. Have 6.35mm headphone jack(This item already Included 6.5 to 3.5 joint) Easily support most high-power headphones, in-ear headphones, ordinary headphones, monitor headphones, PC Gaming headphones etc.. | 🎵Chipset: The mini headphone amplifier chip uses CM6642+ CS8416+ CS4398+ TOP6120A2+OPA2134+NE5532P to provide strong guarantee for tone input and output.The op amp can be directly plugged in and unplugged, and you can replace it with a more advanced or your favorite op amp chip, for example, you can replace it with muses02 etc.. | 🎶Efficient protection and long life: UPC1237 and two big relay protectors may protect the headphones and speakers, 2021 new version has upgraded the basic resistance and capacitance components to improve product quality and reliability. | 🎹CS8416+ CS4398:The classic 24bit 192Khz DAC solution has excellent performance indicators. Many high-end decoding devices with thousands of dollars use the same chipset for D/A conversion. The digital receiving chip uses CS8416. This chip is highly praised by enthusiasts. Support 24Bit 32Khz~192Khz sampling rate to meet HiFi quality and Low noise. Please ignore one star review ,We are under the pressure of our competitors