The BT4000 Big Button Cordless Twin Phone Set includes two handsets with large buttons, making it easier to use for those who prefer a simple and clear interface. The model BT4000 offers a convenient cordless design, allowing users to move around freely while using the phone. Additionally, this phone set comes equipped with a nuisance call blocker feature, providing a practical solution for filtering out unwanted calls. Ideal for households or individuals looking for a reliable home phone system with added convenience and functionality.