RCA - 4 line Speakerphone with Call Waiting Caller ID Four-line convenience with distinctive ring and line-in-use indicators for each line-meets demands of increasingly popular multi-line Expandable to 16 Stations-lets small business owners add additional stations as their business grows Full performance speakerphone with hands free dialing & auto transfer to handset-allows to dial out of memory without picking up handset Optional Cordless handset available-accessory handset mode H5400RE3 provides cord-free flexibility to four lins of the base stations Call Waiting/Caller ID with 99 name and number memory-display shows name and number of new incoming call even if you're on the phone