There's another iPod speaker on the market, this time with a new form factor, from AM Micro.

The iMainGo portable speaker system wraps around the iPod like a particular large and padded case, and conceals an amplifier and stereo speakers.

Also contained in the speaker casing are four AAA batteries, which provide enough battery power for up to 30 hours of listening.

It supports all iPods thanks to a custom designed foam insert that will adapt for any size; it also features an audio input jack so that you can listen to music from other sources.

The iMainGo is available for £60 online, and will be in the shops by the end of this month.