Great little battery powered stereo amplifier with two inputs, so when performing you can plug a microphone and an instrument in, or use the Aux input and jam along with an MP3 player. It does also run on mains power, using an adaptor which is an optional extra. But the beauty of this bit of kit is its balance of battery powered portability and sound quality, which is second to none.
This thing is very loud for its size! It is only 2.5W per side, but it is a very clever and efficient 2.5 watts per side. Roland have always had the knack of getting best bang for buck out of low wattage amps. You will be surprised!
It comes with a very handy strap, so you can wear it over your shoulders as you play. Wandering minstrels take note.
Here is some blurb from the Roland site:
Small Size, Big Sound
At just 11-1/16" (W) x 4-1/4" (D) x 7" (H), no larger than a briefcase, MOBILE CUBE is a traveler’s dream. Battery-powered, it can be operated anywhere — just plug in, turn on, and jam. Two high-performance speakers provide stereo sound that defies MOBILE CUBE’s physical size.
Built-In Stereo Effects
Equipped with Roland’s legendary FX engine, MOBILE CUBE offers high-quality Boss stereo reverb and chorus effects. Sweeten your vocals, add fire to your guitar tone, or immerse your mixes in a rich stereo sound field. Center Cancel is also provided for minimizing vocals in pre-recorded music — great for karaoke and play-along performance.
All Instruments Welcome
Thanks to its variety of inputs, MOBILE CUBE accommodates microphones, keyboards, acoustic guitars, electric guitars, ukuleles, 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 traveling, indoors or out. It’s great for parties, karaoke and vocal lessons. Connect it to a mic stand for use as a monitor speaker or micro PA.