The Cisco key expansion module is a versatile accessory designed to enhance the functionality of VoIP phones. It features 20 keys across 2 pages, allowing for efficient call handling and expanded control. The module boasts a 5-inch LCD display, providing a clear and bright interface that is backlit for visibility in any lighting condition. With a resolution of 480 x 800, users can enjoy crisp and detailed visuals. Connectivity is made simple with both male and female 4-pin USB Type-A connectors, ensuring compatibility with a wide range of devices. Additionally, the module is powered directly via USB, eliminating the need for an external power source and making setup and use straightforward. This key expansion module is an ideal solution for users looking to enhance their VoIP phone experience with additional keys and a clear display.