The DS-KABD8003-RS1/S from Hikvision is a high-quality accessory for building security, specifically designed for integration into doorbell and intercom systems. Made from durable stainless steel, this product offers a long-lasting and resilient solution for outdoor use. It is designed as an extension, providing enhanced functionality and security for your home or business. The accessory is not compatible with smart home systems, making it an ideal choice for traditional installations. With one item per sales unit, it is easy to handle and install. The DS-KABD8003-RS1/S is a practical addition for anyone who values safety and reliability.