The Meross Smart Garage Door Opener is back on sale, only this time at its lowest price $47.70 at Amazon according to the 3Camel website.
I got another one for the 2nd garage door.
Update: Link to the specs for the unit on Meross website with some support details
Specification
Compatibility Check
Mod: Warning - Be aware of safety standards and laws regarding the use and installation of this before purchasing.
Depends if your unit is supported. Check the Meross website or better still contact Meross directly.
It requires a 2pin connection to the unit (2 wire connection acting just like a push button switch). In newer models like mine (Merlin MT100Evo), it replaces the manual push button in its place.