Yeah, this battery-powered combo is pretty tiny. But there's nothing micro about the MICRO CUBE RX's sound... or its features! You won't believe all the cool stuff Roland packed into this 4-speaker combo. Start with eight different amp models. That's right - eight different amps inside this little guy. Plus, you get six awesome effects, a built-in tuner, and even a Rhythm Guide, which helps you learn to keep time like a pro. You can even plug in your favorite music player and jam along. This portable amp is a huge bargain!