Rotus8 said:"These"?
Escort 9500i and V1 are not jammers.
Not sure if the plug on the Escort 9500i is the same as the 8500 but if it is they have a unit specically for laser jamming that intergrates with the 8500. They call it a laser diffuser. Its actually part of the SR1 Escort laser system but they sell it seperately for 8500 (x50). It will cost you 400 from them or 200 on ebay. I've had this unit for about 2-3 years and have travelled with out laser concern for since then.
The unit functions like a radar brain and is hard wired throughout your car. It has 3 diffusers one for your license plate and 2 for your headlights.
If the plugs are the same the 9500i may be the route to go.. The 8500 plug looks like a home telephone connector.