This is the Roland Mobile cube, a compact yet powerful battery powered amp. It has 5W power through two high performance speakers. It can handle all kinds of instruments, particularly working well with ukulele and guitar. Impressively, it includes some digital effects which are very effective. Roland's own description, which you'll see copied and pasted on virtually every other music website will say 'effects include chorus, reverb and more'. What this means is chorus, reverb and delay - in case you were wondering.

Crucially, it has an instrument input and a seperate input for a microphone (jack input, not xlr), allowing you to sing and play at the same time. An auxilliary channel allows an mp3 player to be connected also.

The compact size delivers impressive volume, with the unit measuring 280 mm (W) x 108 mm (D) x 177 mm (H). It runs on six AA batteries, which will give hours of use.