Spec Sheet Preview: The Alpha Communications® DO-002 electric door opener is a low cost mortise type door opener that is designed to be used primarily in aluminum and metal door frames. The DO-002 can be used in right-handed or left-handed installations s imply by turning the door opener upside down, during installation. When used with an 8-16VAC input, the DO-002 makes a buzzing sound, when activated. When used with a 3-6VDC input, the DO-002 activates silently.