I'd go for this 
The mouse is wireless laser, it has two batteries afaik so while you use one you charge the other one so you never have to do something else because you have to recharge the mouse. The keyboard is awesome, many of my friends have it, only downside is that it's pretty big, and if you aren't a gamer you wouldn't have much use for it I guess (the mouse is a gaming mouse aswell). It's also quite pricy.
How much is the voucher for?
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