Metered air system refill is designed for use in the TimeMist 3000 Shot Micro Dispenser and all micro TimeMist Metered Dispensers. Premium citrus fragrance acts as an odor counteractant. Sophisticated technology assures reliability. Proprietary actuator produces the smallest particle size to stay suspended in the air longer for controlling odor. Premium micro refill lasts a full 30 days when set at 15-minute intervals.