Volume potentiometer,Barrier free design, easy to operate.Volume digital indicator, more intuitive. Bass boost,OFF:0dB;ON:+3dB , built-in bass boosting circuit ,it’s different with traditional software to set the EQ, the effect of E10 will be better. USB digital Audio convert to coaxial digital audio output. Line output,Fixed level audio line output with full scale. Support to install automatically without any driver, maximum output :96K/24Bit. All- aluminum shell, enhanced anti-interference ability, thus it’s more reliable and durable.