I bought a keychain garage door remote a couple of months back. Well I just moved into a house and it doesn't have the same brand garage door opener as my apartment did so I can't use this.
It is a Chamberlain 3 button remote and should work with any Chamberlain door opener made after 2005. Can control 3 different things such as other garage doors, lights, or gates. Works perfect and in like-new shape. I paid $35 for it, will sell it for $20 shipped.