Valentine Research (www.valentineone.com)
One of the better radar/laser detector on the market. (Of course, we don't use ours in Virginia.) The Valentine One uses front and rear antennas reporting to an on-board computer to analyze and precisely locate every radar threat, either by direct reception from one antenna or triangulation between both antennas. It will tell you if the radar/laser is in front, beside or behind you. It will also tell you how many radar/lasers are targeting you.