Just took delivery of this today and the instruction manual is horrible. The broken English is nearly impossible to decipher. I'm honestly not sure if I have it set correctly or not. Will report back after testing but be warned this product is likely not for you if you desire clear, easy to understand directions.
2/17/2012 UPDATE - After fooling with this thing for over an hour I decided to pass and return it. I followed the instructions as best I could to set a new passcode and could not. Using the default passcode which would be easily guessed defeats the entire purpose of using one. The unit is either defective or the instuctions are inaccurate. In any case don't waste money on this.