DSP Effect Capability - BOMGE professional 4 channel mixing console has a built-in 16 DSP sound effect processor for improving your voice and music performanceMIC and STEREO LINE INPUT - BOMGE BMG-04B is a professional 4-channel audio mixer, including 2 mono input supporting both XLR and unbalanced 1/4'' Plug with 48V phantom power, 1 stereo and USB/Bluetooth input with 6.3mm XLR, RCA sockets for connecting different devices. such as dynamic, condenser microphone, wireless microphone receiver, gutiar and other instruments etc.Audio Record to PC - The mixer has bulit in soundcard and audio interface for ultra-low noise recording sound from this DJ sound controller toBluetooth Wireless Connection - This sound mixer can be wirelessly stream music tunes from Ipad, Iphone and other Android devices or laptopUSB/MP3/Flash Reader Compatibility - This mixer audio can be connected by external USB, PC computer or Laptop, flash drive or bluetooth devices to mix & record sound output to other devices