What is the best security system for under P5,000? I'm not looking for any fancy. I just want a security system that prevents the car from starting without a key or make it difficult to start, sound the alarm if any of the doors are opened without the key, sound the alarm if my car gets hit. If there is such thing, I want the alarm system to send a signal to my key chain if the alarm goes off.

I know there are no 100% carnap proof alarm, I'm just looking for something that will take the car thief extra time just to start my car.