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: Does this garage door opener come with the A23 battery, or do you have to buy it separately?
Document: this is one of the very few one-star reviews that have been posted by me. this remote is junk. it does work with our garage door opener, but you have to put the remote right next to the garage door opener. it won't work otherwise, first thought was the battery was weak or just about dead. got new batteries and same result. this happened with two of this same remote that we bought.
I bought one of these when the spare remote for my old Genie garage door opener died. I figured I'd risk the twelve bucks to try it out. As soon as it arrived (which was within 2 days, by the way), I input my code and pulled the little battery protector tab, and.....voila! It works like a charm.
This garage door opener remote is compatible with an old Genie opener that I have. It was cheap, arrived quickly, and was very easy to program. No complaints here.You need to unscrew the back, take the key-chain off, and pop it open in order to pull the battery-saver tab out and program the remote with the proper code for your opener.The range isn't stellar, but it works (which is all I need).
Bought this Firefly for my mom. Her ancient, brick type, Genie, garage door opener was on its last leg. We needed to come up with a solution and fast. Looked at Remotecontrol.com and they wanted 70$ for a new refurbish, I don't think so! Looked on Amazon and the 2nd title said it all. There it was a key chain size opener that was made exclusively for a 12 position witch operated Genie door opener.
I like it. Don't mind the color, can't beat the price. I prefer the key chain size. Needed an additional opener for an old Genie and it was hard to come by. Works fine for an old 12-pin dip switch style. Followed the advice of another reviewer and took the key ring off of it to get in and program it. When I reassembled it, and it wouldn't work I found I had neglected to take the little paper off of the battery connector!
Great little garage door opener. Works perfectly! Small and a great price.
The ONLY downfall to this little garage door opener ....THE COLOR. It is horrendous. But it is the perfect size!
Just what I was looking for in an extra  garage door opener. It's small, light weight and easy to carry.
Completely compatible with my old garage door unit. I love the size of the opener and how it fits just right on my keychain.
Checked around at local stores for a small device to trigger my garage door opener. This is inexpensive and works great from my motorcycle.
Answer: yes