This system comes with everything you need to help secure your vehicle, all in one package. No need to buy "extra items". The price is phenominal and spending more for another brand will typically get you less features. The range on the transmitter is superb. From the driveway, it reaches the entire house, pool area and out to the barn. Quite a distance. I've installed 3 systems over the years and this one was the easiest. Any 12 yr old could do it. An added bonus is that the company will send you the wiring diagram for your vehicle, free of charge. And PS.. won't need to call them for support. This system is a clean 11.
This alarm was my first one to install myself and it is pretty straight forward. I did have to call customer service once to get some help and they were great!! Now with a power window and lock kit off of ebay I now have locks that operate very similar to my wifes SUV in my 1984 cutlass. The shipping was really fast as well!! Great experience, no complaints. THANKS OCS!!!!!!!