https://www.amazon.com/Garage-Rolling-Frequency-280-868MHz-Different/dp/B087465RFT?th=1

or maybe

https://www.amazon.com/Akozon-Control-Universal-Wireless-Skylight/dp/B08ZNF5YXH/ref=psdc_573765011_t3_B087465RFT

may need to do some reading to find the right one for your gate.

just so ya know. they are not hard to clone. assume lots of folks can come and go as they please.