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Win an Arcam rCube in our Greatest Gadget of the 21st Century tournament!

As part of our epic Greatest Gadget of the 21st Century tournament, we're giving away one Arcam rCube portable iPod speaker, worth a whopping £500. Here's how to win...

You own an iPod or iPhone right? Come on, 'fess up -- we're pretty sure everyone on the planet is in possession of one of Apple's nifty little noisemakers by now. You probably like listening to music on it and all, you cheeky monkey! Old uncle CNET UK is here to pump up the volume -- we're giving away an Arcam rCube iPod speaker system as part of our Greatest Gadget of the 21st Century tournament.

Why do you want the rCube? Well, apart from the fact that it's built by Arcam, a company with over 30 years experience in the hi-fi market, it's portable, battery powered and even streams your tunes wirelessly. Oh, and it's worth £500. Did we forget that bit?

Pop your iPod or iPhone in the dock on top of the rCube and start blasting those roof-raising tunes. Thanks to a handle on top you can cart the rCube around the house with you, and because it sports a built-in rechargeable battery, there's no need to drag a load of cables with you. Tidy.

If that's not enough convenience for you, you can stream music from one rCube to another, and there are a couple of accessories available that make it possible to stream choons to the rCube directly from your iPod or iPhone, so you can keep playing Angry Birds while you rock out.

To be in with a chance of winning, all you have to do is head over to Greatest Gadget of the 21st Century and vote for your favourite pieces of tech. Every time a new set of gadgets go head to head you'll get the chance to vote again, so keep coming back and follow the action to improve your chances of winning!