Mackie Free Play, Multifunctionsspeaker with integrated 4 - Channel Mixer,with akku or battery up to 10 Hours, Bluetooth,Effekt, Feedbackdestroyer, 16 Rffects ( REV-DDL) EQ, Pocketable attatches easily to a mic stand for easy mixing while performing,Control on the Go App for Iphone or Ipod touch since 5th Generation