Call for pricing The M2616D is designed for people who require multiple lines and quick access to a broad range of features, as well as the convenience of high quality, built-in handsfree communications. By adding one or two 22-button Key Expansion Modules, the basic complement of 16 programmable keys can be increased to 38 or 60 keys for additional lines for access to powerful Meridian 1 features. Features: 16 programmable line/feature keys Dual handset/headsets jacks Compatible with Key Expansion Module(s) for total of 60 line/feature keys, Meridian Analog Terminal Adapter, and the Meridian Communications Adapter