Features: 1¡¢[DSP Effect Capability] The professional 4 channel mixer has built in 16 DSP delay sound effect processor to improve your sound and music performance to enjoy it. 2¡¢[Recording to PC USB Disk] The mixer has a built in sound card and interface, and the DJ controller can be recorded to a PC, U disk or mobile phone. It has built in recording control with output through USB port. 3¡¢[Bluetooth Wireless Connection] This mixer enables users to wirelessly stream music from pad, phone and computer to mix music. It has built in control like play, pause, switch songs and modes. 4¡¢[USB MP3 Flash Reader Compatibility] Can be connected by external USB, PC or Laptop, flash drive or Bluetooth devices to mix &amp record the sound output from the mixer to other devices. 5¡¢[Stereo Input] 2 mono input, supporting XLR and unbalanced 1/4in plug with 48V phantom power, 1 stereo and USB or wireless input with 6.3mm XLR, RCA sockets for connecting different devices, like dynamic, condenser microphone, wireless mic receiver, guitar and other instruments, etc. Package included: 1 x&nbsp4 Channel Mixer 1 x USB Cable&nbsp 1 x Plug 1 x Manual&nbsp