Kleen Aire cabinet is a continuous operation fan model. The Multi-Function Kleen Aire™ Cabinet is a fan unit with on/off switch, LED and light sensor. "D" cell batteries not included with these dispensers. They accommodate gels up to 2 7/8" diameter. The Kleen Aire™ Neutralizer Gels have four different organic fragrances which attack and neutralize odors anywhere they occur. Accommodates most gel cabinets.