the Valentine One is by far the most advanced.
It sees forward backward and side to side, it can put your threats in numerical order of most importance and from which direction the threat is coming from.
You can also relocate the face panel in a hidden part of the dash and direct wire the unit in the headliner, concealing the entire unit.
you can only buy it direct at valentineone.com
They are not cheap but they keep everybit of their resale value. I sold a 3 year old one on Ebay and it got just 20 bucks less than a new one.
Anyone that says a Passport or a Cobra is smoking dope and has never used a V1
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