Open refrigerated display cases, also known as open air refrigerators, are commonly used in supermarkets, convenience stores, and other retail environments to store and display perishable food products. The key feature of open refrigerated display cases is their open front, which allows customers to easily access and select the products they want, without the need for doors or other barriers. 

Other key features of open refrigerated display cases include adjustable shelving to accommodate a wide range of product sizes and shapes, energy-efficient LED lighting to showcase products, and easy-to-clean surfaces to maintain hygiene and food safety. Many open refrigerated display cases also come equipped with temperature control systems to ensure that products are stored at the optimal temperature for freshness and quality. 

Open refrigerated display cases are often preferred by retailers because they offer a high level of convenience and accessibility for customers, making it easy for them to quickly find what they need and make purchases. They also provide a highly effective marketing tool, as products can be easily displayed and promoted to customers. Overall, the versatility and efficiency of open refrigerated display cases make them an ideal option for any retail setting looking to effectively store and display perishable food products.