[4 Channel Mixer]: Audio mixer has a built in digital effect processor with fast response. Professional output has better reverberation effect. [DPS Processor Chip]: Digital Mixer uses a high end DPS reverb processor chip, which is comparable to the music and vocal adjustment ability of an reverb. [Professional Microphone Vocal Reverb]: Professional Mixer, 7 band equalization pre delay etc. Powerful sound processing functions make your voice range and easier to make a good sound. Parameter: Inputs and Channels: 4-channel mono/mic input gain control High, mid and bass controls 1 stage auxiliary control 7-band equalizer 16 versatile digital reverbs Digital display MP3 USB interface recording function Bluetooth connection microphone phantom power per channel Monitoring headphone volume control mute for each channel Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC100-240V Note: Batch different, the appearance of differences, does not affect the use of Colour:Black Material:Iron Package Contents: 1 x Mixer 1 Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.