Wireless keyboard

i have a micro innovations wireless keyboard (it came with an optical mouse witch i dont use a mre) but my keboard all of a sudde stops wrkig andb it wont connect. i changedthe batteri and everything bu it still wont conect, i even tried huling out m old mouse but it wonr connect either.
sorry for the spelling but i'm not used to usn on-screen keyboard

buy cheap hardware, expect it to work poorly and/or fail.  i'd stick with a plain old wired keyboard unless willing to fork over some moolah for a quality wireless.