Large Button Phone Big button for easy dialing  Volume control on handset Up To 40db  Hearing aid compatible  10 two-touch memories for speed dialing the memories are backed up for life even if the unit is unplugged from the line  2 one-touch speed dialing the memories are backed up for life even if the unit is unplugged from the line Line powered for amplification. Red 911 emergency key. This number is backed up for life even if the unit is unplugged from the line  Bright LED for incoming calls  Flash key for call waiting  Redial / Pause Key  Mute key  Ringer hi/low switch  Store Key on back of phone to prevent memories accidentally being erased or changed  Desk/wall mountable PrimeBuddy does pay for defective return shipping for this item.