This is an example to show you just how much the Valentine One has changed in just laser detection alone. The Valentine One back in the day had six individual infrared laser photo diodes mounted on the laser board and facing the front of the car (two at an angle to obtain greater coverage). http://www.ieec.binghamton.edu/ieec/teardown/microwave_radar_detectors.htm The current Valentine One has a huge prismatic lens for laser detection that will alert almost 100% of the time when shot with laser from almost any distance. By comparison, the brand new Beltronics STi which is about $450 uses what looks like only 4 individual infrared laser photo diodes as you can see at the top of the 3rd picture in the link below (5 Optical Laser Sensors according to their website) to detect laser. It appears that Beltronics latest and greatest STi is using Valentine One's old laser detection technique but they are using only 4 diodes and the old Valentine One used 6 diodes. https://gullfoss2.fcc.gov/prod/oet/forms/blobs/retrieve.cgi?attachment_id=583479&native_or_pdf=pdf