This is one of the best keyboard and mouse sharing apps Ive used. If you use your N7 near your PC a lot, this is for you.
https://sites.google.com/site/droidskm/
https://play.google.com/store/apps/details?id=com.liveov.skm
https://sites.google.com/site/droidskm/
https://play.google.com/store/apps/details?id=com.liveov.skm