It seems that the consensus is that Hawaii cops only use LIDAR. This quote is taken directly from a Hawaii police officer on another forum "We have radars for use at our department (KR10s) but maybe 1 for every 4 officers so I bought my own. I got a refurbished Kustom Golden Eagle for $1200. Excellent radar unit. Front and rear antennas, same/opposite moving mode, fastest/slowest and stationary modes."