Merlin is the Australian branch of Chamberlain, one of the largest garage door manufacturers in America. Having operated in Australia and New Zealand for over 40 years, there is well over 30 different Merlin Garage Door Remotes. Most merlin garage remote controls can be easily identified by looking at our photos.
If you have a round, green remote you would require the Merlin M-842.
Does your Merlin garage door remote have blue buttons? You would require the M-802 dipswitch remote.
If you have a oval remote control with three buttons, you would require the Merlin E970M.