Panasonic 1100 is a None Gap DECT phone, this means the handsets will not register to any other phone and are set up in the factory so if you buy a twin it cannot be a triple later. Even though it's entry level, the smart and durable silver finish is very classy; features such as 10 number redial, illuminated display (not buttons), 50 number caller id log (service option) and 50 phonebook entries ensure you have control over who has called you and when.Add a uConnect Skype USB adapter with this phone - see related products below.