Look for a radar detector that responds to all types of radar currently used by the police... yung sa akin programmable na magdagdag ng radar type kung may bago. May autoscan din sya which is nice kasi hindi na ako magkakalikot pa to adjust the radar from highway mode to city mode. Also, halos lahat ng radar ngayon may 360 degree protection. Isa pa, ayos din yung malayo ang range ng detector.... yung iba kasi maga-alarm lang kapag less than half a mile na lang yung layo ng pulis, di ka na makapag-slow down in time. Meron ding mga nice to have features like real voice messages.... Lastly, look for a radar na may magandang warranty.