I use bottomline scanners front and back + a flasher for high speed mounted on console use a handheld garmin gps with heavy duty velcro on the back that way can use it on boat, truck and motorhome . Flasher Jimmy Houston 99.00
both 360 bottomline off ebay 200.00
gps 150.00 good to go
360s are accurate to 200' flasher tracks well at 60+mph
gps works in all vehicles but none of this stuff is new and shiney save my money for gas and beer......