Independent Volume ControlEach channel has its own separate volume control. Use the knob to adjust the output according to your needs.Build ToughThe 4 channel mixer is built like a tank. Sealed rotary knob safeguard component. It can withstand rough handling.Digital Display The Usb mixer has a large Lcd. It shows important controls and functions, making it very easy to operate. Wide CompatibilityConnect different audio sources, such as phones, computers, musical instruments, microphones, and more.Audio Mixer Specification:Color: BlackInput Mixer Channels: 4 ChannelsBluetooth Connection: YesUSB Input: YesPC Connection: YesDisplay: LEDPhantom Power Voltage: +48VPower Supply: 100/240VCompatible Device: Mobile Phone / ComputerMaterial Type: Plastic + MetalWireless Mic Specification:Color: GoldTransmitter Type: HandheldMicrophone Type: DynamicOperating Range: 30 metersBattery Type: LithiumWireless Technology: UHFCompatibility: Mixers, amplifiers