I am wanting to purchase an electric collar for my Saint Bernard. Which model would you recommend for an 105 lb saint. He is 11 months old?

I am wanting to purchase an electric collar for my saint bernard. He gave me a huge scare last night when he refused to come when called after he slipped out the front door. I have conditioned him to wearing a long line, but he can still tell when it's off, and will completely disregard me and act like it's some kind of game when I call him. I'd like him to know that no matter where he is, I can reach him. It is frustrating, scary, and infuriating when he runs from me, and he won't respond to me running the other way or trying to play with him anymore.

Which model would you recommend for an 105 lb saint. He is 11 months old. I would prefer a dogtra collar if possible.