OP, this one does not require software or connection to a computer and it comes with 5 stick-on discs that can be used inside of the mirror housing. You can also buy additional discs from Amazon. For best operation, I use 4 discs, 3 inside the mirror housing and one taped to the outside edge of the mirror housing. It may be overkill, but I never have an issue driving through the gates.
Amazon.com