I still have to hook up the wireless transmitter to the relays. I am using these:
Sensors
Zigbee relay board
Wireless transmitter (paid more then I should have for someone else to solder 6 wires)
As it happens, my wife bought a wireless remote off Amazon for my daughter. She bought these:
After market remote (knock off) which come to about $9.50 each.
I'm using this app: Zooz garage door opener
I hope this helps someone researching this later.