Knock lock (Knocklock) - Knock To UnlocksteveSeptember 17, 2016I seem to have an issue, and after doing some serious testing to duplicate the results, I have found that the "knock pattern" can only be used once, and then must be reprogrammed. Simply put, I program a secret knock, then if incorrect entry knocks are tried, it doesn't open. When I knock in the correct knock, the door opens, but then when I close the door, the secret knock will never work as correct again, until I reprogram. Then it works perfectly, only one time. Does anyone else have this issue or suggestions? Seems a pain to reprogram every time. Don't think it's right.... From the seller: it sounds like it may be defective. Just return it to us and we'll be happy to replace it.
Knock lock (Knocklock) - Knock To UnlockRandy PeckDecember 8, 2011We have used a Knock Lock to open a secret bookcase door for several years now, and it has performed flawlessly. The reason for the 3-star rating is because it uses the same device for input and output. That is, a simple microphone is used both to listen for knocks and also to "chirp" back the signals indicating if your knocks are received and correct or incorrect. This is a problem because the volume of the chirps is too loud and cannot be controlled. If you insulate the "speaker" then you are insulating the "microphone" and it can't hear the knocks. So the result is that a fun and mysterious way to open a door gives itself away as an electronic gadget that beeps like a children's toy. I'd be much more happy with a version that supported a way to disable to chirping or at least turn the volume way down. I would still recommend the product because it works great and I don't know of any other option.
Knock lock (Knocklock) - Knock To UnlockRobertDecember 4, 2009Has worked for over 2 years and still running on the original AA batteries.
Knock lock (Knocklock) - Knock To UnlockamjadJuly 29, 2009great product
Knock lock (Knocklock) - Knock To UnlockEvan KaymenAugust 11, 2009We have used the knocklock a few times now and really love it. It is the perfect interface for an installation when you want nothing showing on the outside of the door. It has always worked flawlessly.