I don't know if it is original or after market. One push will lock or unlock the doors, two pushes adds a headlight flash and a short honk of the horn. I don't know what the two buttons on the right do; I've never tried them.
Does anyone know what I've got here and have any info on how to use it.
I'd say take a peek under your dash to see if there is an alarm/keyless entry box ziptied somewhere. The power for the box should be taken from the ign. harness right in front of the brake pedal, and the door lock wires are right near the passenger kick panel that feeds out to the door.
go to the web site & try to download owners / install manual. then you will know what you are dealing with. then let us know. i used to sell / install code alarms 5 years ago. seemed to be a decent alarm for the price.