Both. I drove cross-country CA to NJ in a 1-week span and between Waze and the R7 it alerted to just about every cop along the way across 11 states.
R7 didn't work in Ohio (OSHP) though for some weird reason. Perhaps they use laser, not sure, but in any case it showed up on Waze.
I think laser would be overkill unless your state uses it for a fact or you're doing the Cannonball run LOL.
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'21 M3 Base - Brooklyn Grey
CA -> NJ
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