Car Antenna Radio FM & Am Signal Amp Amplifier Booster ??

Hey! I was wondering if someone could explain how to install this to car? I bought one off ebay for like $5 and says easy install... but I'm not to savvy when it comes to cars lol

Reason I purchased this was because I just got a sharkfin antenna for my 08 and someone was kind enough to give me heads up while most people don't lose signal reception some may lose reception on stations they often listen too, plus station i mainly listen to isn't always that great. If there's a how to video I would greatly appreciate it!