1、Intelligent Noise reduction: Mini 4 channel mixer circuit chip is fully upgraded, intelligent noise reduction, sound quality fidelity. 2、Imported Potentiometer Knob: Adopts imported potentiometer knob, which has the characteristics of long life and good hand feeling after rigorous testing. 3、Built In Bluetooth Module: The mixer can be connected with Bluetooth enabled mobile phones, computers, tablets and other devices. 4、USB Socket: The mixer has a usb socket, which can be directly inserted into the U disk to play music, which is easy to plug and play. 5、4 Channels: 4 input channels, each channel is independent, treble and bass adjustment, gain adjustment and reverb adjustment. 6、Compatibility: Professional input and output interfaces, compatible with multiple devices, rich in usage methods. 1 x Mixer Console1 x Data Line1 x Charging Head Item Type: Audio MixerMaterial: ABS+MetalBluetooth Version: 4.2Total Harmonic Distortion Of The Entire System: < 0.1%Frequency Response Range: 20Hz-20KHz/± 0.5dBS/N≥: -80dBMaximum Output: 4VInput/Output Impedance: MIC: 2.4KΩ; Mono: 11KΩ; Stereo: 100KΩEqualizer: High: 12KHz±15dB Low: 80Hz±15dBPlug Voltage: AC 110-240V