As has been said many times before,when buying especially Chinese goods from UK importers,be sure to check 2 things...
First that your warranty is for returns to a UK base for repairs etc as opposed to the manufacturer.
Secondly,ensure that the goods are rated for 240V as opposed to 220V which can cause problems with some of the 211/845 based amplifiers.
Both of these issues are usually associated with so-called "grey imports".