Auterra makes it. Go to their website for details on it. I bought mine on Amazon for less than retail. I like it because it's easily transferred from 1 vehicle to another. Already used it on my V8 Pathy, 370Z, friend's mom's Maxima, friend's Tacoma and friend's sister's Civic. If you have other brands of vehicles or like to help other people out, the DashDyno will work for you. If you're only concerned about your Nissan, Cipher will be the better option.what brand and is it worth it>? how much did your run you?