The older 53718, 139.53718 Sears Craftsman made Digital 390MHz remote controls can operate one, two or three garage door openers or gate operators. It features 9 trinary coding switches to set your code. There are nine (9) dip switches, each of which can be placed in three different positions ( +, 0, - ). The receiver and all the remotes must match. This enables you to use as many remotes as you want.