The Roland Mobile Cube is an all-purpose battery powered amplifier.The Roland Mobile Cube is designed for use anywhere, anytime and can handle all types of electronic instruments and audio devices: just plug in, turn on, and jam for up to 15 battery-powered hours.Although perfect for guitarists, the Roland Mobile Cube can also accommodate microphones, keyboards, MP3 players, and more; no other instrument amplifier of this size has a stereo input port. Use it as a practice amp at home, while travelling and for performing indoors or out. It's ideal for parties, karaoke, and vocal lessons. The Roland Mobile Cube even connects to a mic stand for use as a monitor speaker or micro PA.At just 280 mm (W) x 108 mm (D) x 177 mm (H), the Roland Mobile Cube is no larger than a briefcase. At its heart are two high-performance 2.5-watt speakers which deliver powerful stereo sound that defies the amp's diminutive size.Finally, the Roland Mobile Cube is equipped with Roland's legendary FX engine, offe