ive got a cheap one on mine, it was under 150 installed & uses the stock key fob. works fine, & is adjustable. i can start my vec. during winter while still inside the building, leave the heat controls on, & its toasty warm when i come out. (gotta love that) its an AVITAL 4000XL, but theres plenty of better brands out there.(different key fobs, w/wo alarms, etc.) its whatever brands the install shop carries. i went with the cheapest, but its served me well for over 2 years now.