Wall Mountable – Mount right on the wall, enjoy its convenient features without giving up a lot of desk space Last Number Redial Timed Flash – Supports Call Waiting and PBX use, ensures that a caller is not accidentally cut off while on hold Electronic Volume Control – Even in mid-conversation, you can adjust the receiving volume of the handset to any of 6 levels 3-Step Ringer Selector – The ringer volume can be set to Off, Low, or High. Set it to Off when you don’t want to be disturbed during a meeting