Smart Garage Door Opener, APP Control, Alexa and Google Assistant Voice Control

GD801 is specially for overhead garage door, sectional garage door.
1set GD801 includes 2 parts.The main part with plug and Socket. If your only have 1 socket for garage door opener, add GD801 will not need to buy another socket. It's very convenient!
The small sensor should be attached on the top of garage door, the wire end of main part should be stick into the #1,#2 hole on garage door opener, and plug the plug into socket. GD801 upgrade common garage door opener to smart garage door opener.