With front and rear cameras and many state of the art features, this appears to be an extraordinary product. Problem is all of the literature is in Korean, so unless you read Korean you'll have to guess through the installation. I searched the Internet high and low for installation instructions in English, but no luck. Accordingly, I haven't installed it yet. So I gave it the lowest rating possible because of the very poor customer service (IMHO not providing English instructions for a product sold in the US is the very definition of lousy customer service). For all I know it may be a 5 star product, but until I install it I'll never know.
Unless you can read Korean or have a good friend who can, I highly recommend you don't buy this product until English language literature is provided with the product or on Invai's web site for downloading. Frankly, I'm astounded that both the maker, Inavi, and the seller, Amazon. com, pitch this product in the US without English language installation information. How foolish and deceptive is that?
Update: The English instructions for the FXD700 work fine for the 900. Now that it's operational it's an outstanding product and I give it the highest rating.
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