digital lock for sliding patio doors?

[Bill Dufour]

I have two sliding glass patio doors. Any reviews on the digital door locks made for them. They all seem to be non electric locks with a combination lock. Very unclear what will fit to my doors. No makers name on the doors or the latches. There is no provision to unlock the doors from outside. Doors probably came from Home Depot since a lot of stuff in the house did.
Bill D