I recently purchased two used Herelink controllers and air units from a colleague. I just updated the firmware on the controllers and was prompted to enter the Product Key. One controller had a sticker with the key on the back, but the other did not. The person I bought the unit from does not know the product key or the original reseller.
Other posts on this topic are suggesting to contact the reseller. Since I don’t know what reseller the device was purchased from, who do I contact to get a product key?
I can share the serial number for the device if that helps.