I bought this product to complement an asus rt-n66u router. I spent several hours trying to get them to work together with the family complaining that the internet wasn't working. I gave up and bought a cheaper tp-link td-8817 and had it working in a short time and it hasn't stopped since. I think there is an incompatibility between the asus unit and the the draytek one. I phoned draytek who told me that the two units will work together but they couldn't provide a sheet detailing how to achieve this nor could they put me in touch with anyone who had made them work together. I asked for a refund but was told that was not possible as there is nothing wrong with the unit. The draytek may be a good product but it wont work with the asus. Good luck!!