Looking for a good security system for my apartment?

Question

It wont be connected to a security system, i just need something to make a TON of noise when intruders come by

Answer 1

Since it sounds like you're looking for a relatively simple, cheap security system, I've included a link below to a system that I think will work for you.  It has a piercing siren, no programming required, and is wireless.  And, it comes with a  motion sensor and 2 door/window sensors.  This should do the trick.  Good luck.

Answer 2

If its for an apartment your best bet would be to go with a wireless system like one Rogers or Bell provides for only $100.00.

But if its a ton of noise you want then its just the case of getting a higher watt siren. The most common sirens are 20 watts, try and get a 30 watt (or higher) if you can. :)