There seem to be three or four leads and may be programmable in someway.
Seems like these are made by same OEM (priced at ~$200):
http://www.ebay.com/sch/i.html?_nkw=GSM+RFID+home+alarm+system
For 12$ a piece they are paying you back $25 in T-mobile pre-paid cash i.e they are paying you $13 to order this.
In other research on this item, looks like it had an iPhone app, but removed from iTunes store:
http://download.cnet.com/SAM-C5/3000-2094_4-75918250.html
Android app seems to be still available:
https://play.google.com/store/apps/details?id=com.demo.sam&hl=en
I am h