MK343 that is made by Magic Key is a kit compatible with Homelink mirror button which is original built in by a motor manufactory like Chevy Traverse, Mercedes-Benz BMW and all models of Telsla etc.
Our receiver with a harness that easily to hook up on opener in garage.
It is not suit for a 'Homelink' mirror DIY kit purchased from USA.
We will send instruction to show How-to:: Make Tesla etc HomeLink work on tyour garage door opener.
a typecal opener ATA GDO9 GDO11
red wire hook to +v or 24V
black and gray go -v or com
blue wire goes to O/S/C