The model number of this remote control is GTXU-3 which is used for some Gliderol garage door openers. This remote has been obsolete and discontinued. An add-on receiver needs to be installed on the drive unit so new replacement remotes can be used.
There are two conversion kits available MK701GL or MK702GL. Installation is pretty easy, just hook up and play!
Please note this remote looks exactly the same as TM305C, the only difference is that there is no "TM305C" at the back. Please do distinguish before purchase.
This one has been upgraded to MK702GL.