RCA 4-Line Speakerphone Four-line convenience with distinctive ring Expandable to 16 Stations-lets small business owners add additional stations as their business grows Full performance speakerphone with hands free dialing and auto transfer to handset Optional Cordless handset available-accessory handset mode H5400RE3 provides cord-free flexibility Lline-Switchable Data Port for Fax, Modem or Answerer-Adds versatility