The Food Freshness Card is a large hologram that is programmed with longitudinal electromagnetic waves. Our U.S. patented process allows us to modulate these longitudinal electromagnetic waves with different frequencies or frequency spectra. The modulations to these waves target specific strains of bacteria and mold which can inhibit their growth. The Food Freshness Card does not directly kill mold or bacteria but instead creates an environment that can slow their growth rate. Mold and bacteria are main causes of food spoilage, if you can inhibit the rate at which they grow, you can increase the shelf life of food.