Spy Video Recorder Spying????

Spying???? - spy video recorder

I'm trying to get a key logger. I want to find an audio recorder and even video recorder. It should not be in real time, I suppose. That is the situation: I look at my girlfriend. I live about 3 miles from the city. I see certain things, but you do not know where they go or where you learn about this topic. I will not spend too much money, just my girlfriend. An RF transmitter would be great, I think. Simply search for information.