[1gspot]

hmmm well let me shoot off real quick my understanding...

radar/laser detector - detects when stray rays hit the detector, possily from when the cops tried to clock someone else. But if they arent clockin and u fly by all they gotta do it hit ya and ur toast before u even knew it. but if they do clock someone else the stray rays can be picked up from a fair distance away. however laser since it is a more narrow beam is harder to detect from a distance

radar/laser jammers/scramblers - Scrambles the radar so when the beam gets back to the cop it reads nothing on the gun(illegal in some states)

as for which one to get my bud bought a cobra 9k series and he has yet to get a ticket its saved him a couple times