One of them is about 5 years old, and one is about 2 years old. I was driving around with them the other day, and against all known falses, they both alert less than half the distance of my V1, and my old (sold) Bel STi. I saw the newer on perform up against a LEO shooting C/O Ka, and the detection distance was terrible, maybe 300 feet. Needless to say, we saw the LEO way before the Cobra alerted.
Due to the horrible detection distance, it's easy to understand why they have over 15 speeding tickets collectively.