I never buy mouse and keyboard that is not Microsoft. A long time ago I gave up the lesser known brands, and other also known. These are the best, more reliable and fast I know. Below, the keyboard and mouse desktop set 800 from microsoft.
Comes with wireless mouse and keyboard with only one receiver.
Comes with two AA batteries and a Duracell.
The mouse works with only a stack.
Look at the receiver.
The keyboard works with two batteries.
A great advantage of buying the Brazilian model is that it comes with cedilla.
Look at the entire keyboard. Very comfortable and includes a key for the calculator.
It cost only R$149,00 in Kalunga.
Very good product. Really liked it. Cost cheap considering the value of the dollar. I leave below link to Google Shopping, where you can find even better price than my: