Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Will this remote cancel out older remotes?  I read a review where this remote would keep older remotes from working, requiring to upgrade all remotes.
Document: These work great. We had commercial door openers at the fire station with wall mounted controls. Liftmaster advised that this and one other model would work with the openers. We had issues in trying to program the remotes in that we had three sets of instructions and none were the same and none worked. A phone call to customer service got us the correct instructions and we were successful in getting everything working. Once programmed, be prepared for the remote to need to be pressed for about five seconds for door operation on the first use.
Also, if you are adding a remote, I would make sure the new remote uses the same batteries as your existing remotes so you can keep battery replacement simple. Most of the remotes  use 1 lithium round disc battery but some of the newer remotes use 2 smaller lithium round disc batteries. This uses 1 lithium battery, was very easy to program, and appears to work nearly all opener makes and models and well as nearly all learn buttons. I highly recommend it.
I thought this is what I needed but it's not working properly. This is the proper replacement of the older version. The set up seems very easy to do but when I put the remote in my car and push the button, nothing happens. This is getting to be very frustrating.
I am a real estate developer/property manager (among other things). half the time, our tenants DO NOT return their garage door remotes. we have openers running on 2 different frequencies, thus it was  pain to stock replacements. this remote will work with all of our operators, thus making inventory EASY. programming is easy...just read the clearly written instructions and "budda bing", you are DONE. will continue to purchase.
I wasn't sure this would work because my old remote only had one button and looked boxy and old-fashioned, but this is some sort of universal remote that is backwards compatible into the 1990's. It took a while for me to program it but that was because I was trying to read the directions while standing on a ladder as I was programming it. When the instructions say to push the button on the lift unit and then push the button on the remote, they mean to push the button on the remote REPEATEDLY until the big light bulb on the lift unit blinks, not the little LED light next to the programming button on the lift unit.
Suffered random openings no matter how many times I cleared the codes and reset. Had a door company come out and they confirmed that these did not work well with older (post '93 systems) even though they are advertised as such. While Liftmasters (Chamberlain) still made circuit boards, etc, for the circa 93 systems, they no longer make the remotes. The service tech built me an old remote from spare parts on his truck, and it works fine. The new remote sits on a shelf in the garage, unprogrammed and unused..
I needed a new garage door remote after mine stopped working. I tried replacing the batteries but that that didn't work so now I have spare batteries - lol. I researched garage door remotes pretty extensively as some of the reviews were pretty bad, but I have to say that I think most of the problems people ended having because they didn't make sure the remote was compatible with their existing equipment. You need to make sure that the remote will work with the learn button on the opener. The learn buttons are color coded so make sure the remote will work the particular color learn button that you have.
I replaced one of two garage door openers with a new Chamberland. The three button remotes that came with the new unit were not compatable to the older opener, a 1994 Lift Master. In researching the Lift Master website I learned that the 893MAX opener should work on both the old and new models. Lift Master wants $41.95 for the opener. To my delight this remote came at a much lower price and worked perfectly. I was able to program both openers without a problem. If you are debating if this will work for you, there is a great video about this remote on the Lift Master website.
Before ordering I contacted LiftMaster Technical Support and they confirmed that this unit would work with my Liftmaster made in Aug 1995. Just read all of instructions in each step. I was done in 2 minutes. Instruction step 3 is where I had to press the button 3 times before the garage opener light blinked indicating it had worked.
I have a Lift Master from 1993 with no remotes. I looked on Amazon and found the 893 Max. Then I looked on youtube for how to program it. It worked just like the video said it would. It eliminated a lot of headaches. So I am now ordering a backup.
Answer: yes