V8 Plus Soundcard with Display Material: Drop surface design, electroplating key, electroplating knob, metal spray paint. The surface of the shell is sandblasted with metallic paint. It has a sense of grinding, anti-scratch, comfortable and delicate touch. Multi-function: reverb size adjustment, microphone volume adjustment, high and low adjustment, recording volume control, music volume control, monitor volume control (headphone function). Support mobile phone computer use, support single earph