The Roland CUBE-30X Guitar Combo Amplifier expands the famous Roland CUBE amp lineup. With great features such as Power Squeezer for maximum sustain without maximum volume, a mini-jack aux in for playing along to MP3 and CD players, recording out, and that incredible CUBE sound, this little Roland combo amp is built to rock! The CUBE 30X also has some of Roland's most popular guitar effects built-in: Dyna amp (changes tone based on picking style), metal, classic, stack, tweed, brit combo, black panel, acoustic simulator, flanger, phaser, tremolo, chorus, delay and reverb. Roland also builds a convenient onboard tuner into the CUBE 30X amp.