For A10 A40 QC35 II QC45 Gaming Headset USB Audio Controller Cable 1. The button on the left side is to turn on the sidetone function of the earphones, that is, the ambient sound is transmitted to the earphones through the microphone, and your own voice will also be transmitted to the earphones. 2. Computer Controller: By turning the top knob on the desktop volume controller, you can adjust the master volume, including the volume of any application currently in use. 3. Microphone monitoring: With the microphone monitoring function, you can hear your own voice through the headset. Press the button on the front of the controller to cycle through four monitoring levels, Off, Low, Medium and High 4. Suggestion: When using active or passive noise-cancelling headphones, make sure that you can receive reminders such as phone calls or ringtones. If you use them outdoors, you must make sure that the environment is safe 5. Function: Optimize sound 6. Device jack: 3.5mm 7. USB protocol: fully compatible with USB2.0 8. Working voltage: DC 5V 9. Working current: less than 20mA 10. DAC decoding SNR: 97dB 11. DAC sampling rate: 96KHz24bit 12. Headphone drive capacity: 16-150 ohms 13. Hardware equalizer: bass and treble boost 14. Support audio bit depth: 1624bits 15. Support broadcast parameters: 8K16K22.05K32K44.1K48K88.2K96K 16. Weight: 225g