The Avanti AC3 protects your electrical system from overload that may be created by using appliances such as a Refrigerator and a Coffee Maker, on the same outlet. The convenient Avanti AC3 junction box does more than just allow multiple appliances to be plugged into a single outlet. It protects your electrical system from overload that may be created by using appliances such as a microwave oven, a refrigerator, and a coffee maker, all on the same outlet. It protects the circuit by reacting to the use of the microwave oven and disrupting the current to the other two appliances any time the microwave oven is in use.