This forum is for trading questions.
It isn't for us to give technical advice on using items bought here, least of all on electrical items bought from sellers in China. There is never any certainty that these will even comply with UK electrical safety standards.
Please be careful. This is not a 240v appliance and from the seller's description and photos it appears to require an input voltage of DC20V to DC32V. The photos show a "DC in" socket, which should indicate to you the size and pattern of plug you require.
If in doubt, consult the seller or take professional advice.