Volume Control (ADA Compliant) Tone/Pulse Dialing (40/60 make/break) Positive Line Disconnect Ringer Volume Control Flash (300/600 msec) Hold with LED Indicator Visual Ring Indicator Hearing Aid Compatible Desk/Wall Mountable Directory Card Fully Modular Matte Finish Data Port Pause Last Number Redial Two-year Limited Warranty 20 Memory Locations Release Storable Flash and Pause