The V1 is a pure radar detector, and focuses entirely on that. That is why it is the top detector to use. It puts pure focus on the important stuff, and disreguards that other crap that other companies like to put into their detectors (Can anyone say Cobra "12 Band" detection, and Compass?
)
The directional arrows are actually a feature that other companies
want to get into their detectors, but cannot due to the patents that Mike Valentine still currently has in effect. The V1 was developed to be similiar to a Miliatary RWR system: Identify the type of thread, the number of threats, and the location of the threats. The Military doesn't bother with whether the frequency of the SU-27 Radar is xx.xxMh/z, but instead just displays a '29' symbol on the RWR (since the Su-27 shares the same Radar as the MiG-29). I'm not sure about you, but its easier to dechiper a big Flashing Ka than to try to remember what in the hell 35.5 Mh/z was supposed to be. Also, the V1 uses the directional arrows to determine the source of the threat. The military aircraft have a 360 degree detection, and it'll place the symbology in the position of where the radar was trianglulated to be. This lets you know whether the threat is coming, or if it behind you and can be disreguarded (or to treat it as a threat if your state allows moving radar...). The threat counter also shows the number of radar sources, so you know exactly how many sources are there. If you're on the interstate and recieve a strong hit of Ka, and you notice it is 1 source, its easy to see that it is highly likely a Krispy Creme fanatic, But if you're in town, and the threat counter reads 6 or something like that, then its likely you're just in the middle of a shopping complex.
Also, V1 doesn't deal with Voice alerts, Why? Well, its pretty simple. For one, voice alerts are harder to understand when you're somewhat distracted (Convo with a passenger, jamming out to Rammstein...etc), so you may hear the VA, but didn't hear what it was actually trying to tell you. Meanwhile, when you hear the tone, you understand what it tells you pretty easily. Beeps are usually X band, Braps are usually K Band radar. Also, the tones can tell you the strength of the signal. Low signal strength is a slow frequency, while a high signal stength may be indicated as a solid tone. If it works for the military and has saved many a USAF/USN/USMC pilot, then it'll help you out
.