PNI sells to like Wal-Mart, but they work well. I dont know much about V-1's. My dad is the senior engineer at PNI so i do allot of the testing, so they just give me a bunch of shit. The V2020 has wireless sensors, its pretty cool. ill get a pic of the inside, i got both the radar and V2020 on dash. I just realized the Steele Eye hasnt even came out. But its my favorite so far.