It has to work in conjunction with the OEM alarm AFAIK 
  
EDIT:  
I think it's a stand alone system actually, but I cannot help but find holes it the setup 
http://my350z.com/forum/audio-and-video ... -350z.html 
  
If you read through it, it claims you don't need your keys anymore, totally keyless sytem, then it says you need a key in the barrel, but also claim that it cannot start the car as the transponder is missing from the key, but then also that you have to put the transponder into a RF immobilliser bypass module, so that the signal can be sent once the key is ACC position (which it already is to circumvent the steering lock). 
So in my head tells me, the transponder and key are there so the car can be started. even bypasses the need to put a foot on the clutch in the manual Zed. 
Just really don't know how "secure" this alarm system is. 
Oh and upon further digging, the whole system originates from Korea and is made by a company called DowonTec 
  
 
  
And that too 
  
 
  
And what about when you are out and about? 
Hand the control module over to a stranger? 
  
  
I was being sarcastic   Damn internet not convaying this! 
  
You forgot the 
*sarcasm on* 
and 
*sarcasm off* 
bits