With the name and number directory feature included in the ML25055 2-Line Cordless Handset Accessory, you can store up to 99 records. The records in the directory are then stored in alphabetical ascending order for your convenience. Build a system of up to 10 ML25055 cordless accessories—all wirelessly. This wireless handset is part of a system. It does not work independently. You must have the Motorola ML25260, ML25255, or ML25254 Desk Phone Base Station for your phone system to function.