The Martin Ranger MA2500DSP karaoke mixer features Bluetooth wireless streaming from your device. Play your entire MP3 digital music library from your cell phone, PC or Tablet and USB/SD drives with a new handy built-in 4-Band DSP Sound Effect Digital Processor(X-bass, high, mid, low) and adding 3-Way Mic Feedback design to effectively inhibit howling, protect speakers, and enhance smooth sound when you are singing. The amplifier produces a powerful 1500 watts (750W + 750W at 4 Ohms) of power and the mixer features four microphone inputs, two line inputs (AUX and DVD). Also, with the built-in 32-bit Quality Digital Key Controller, user can change the key of their music 11-step. Connect external devices like outboard effects processors using the LINE and REC outputs. It can easily drive 2 pairs of speakers at once powerful enough for just about any party or restaurant. The Martin Ranger MA2500DSP is guaranteed to provide all the power and mixing capabilities for your professional or private needs. Package Includes: Remote Control User Manuel