I've just picked up a new Trek bike with the speed trap in the fork....
The sensor is cheap, but i havnt found an entry level computer that works with it. I've searched on this forum, but most everything talks about higher end models... I'll get there someday, but for now, i need something that is reliable and hopefully works with the speedtrap sensor..
It operates at 2.4 GHz, so you should be able to make other brands of computers work with it, but most computers that operate at that frequency are pricey it appears.
Merely operating in the same frequency band does not imply in any way that two items will work together. Yes, it's a requirement for the devices to work together, but it's not sufficient, and if the devices are made by different manufacturers and aren't designed to work together, in general they won't.