The DS-KD-ACW3 accessory package is designed to support three modular door station modules. Generally, customers choose to pair this accessory with a Video Intercom Module Door Station, and a combination of two Card, Keypad, or Button Modules. The DS-KD-ACW3 is built with high-quality aluminum, and contains all of the necessary hardware elements for integration with other Hikvision products for custom access control solutions.