Altigen Altitouch PC/PBX Compatible Interactive Screen Telephone with Call Display, Visual Call Waiting, and Visual Call Waiting Options, Speakerphone with Mute, 100-name and number Callers List, 200-name and number Directory List 10-number Redial List,Large eight-line backlit display with six display keys, Headset port for use with PC type headset with microphone Dataport - plug another phone into this one Flash (Link, Switch or Answer) for getting Call Waiting calls, Multi-function indicator light (incoming call, extension-in-use, message waiting*, and Hold), Copy key for saving Callers List information into the Directory* Options key - 6 programmable features On-hook dialing, Goodbye key,Current date and time display, Contrast control for the Display Screen, Ringer, Speaker and Receiver (Handset) volume controls, Desk or wall mountable English/French/Spanish language choices Hearing aid compatible, ADA compliant