Priced at £10+ everywhere else, these things are power-free speakers/amplifiers.
You just stick your iPhone in it – and it sends the speaker sound around a curved unit, which amplifiers – just like a speaker.
They are genius (and I picked mine up from Tesco).
Couldn’t believe they were so cheap at Tesco (photo in first post) – down to £6.50 to clear!
But then looking around, standard prices as usual, but found it (amongst the multiple listings) for £6.95 delivered on Amazon too! (Deal link is for the Amazon deal)
Genius bits of kit – and small too.
So just stick one in the kitchen for when you’re cooking etc, or in the front room as a genuine speaker system (at full iPhone volume – these things are LOUD!)