Cortelco Centurion corded telephoneReceiver volume controlLast number redialTone/pulse switchableVisual ring indicationWall mountablePauseRinger volume controlHearing aid compatible-FlashLine in-use indicatorData port-Message waiting lightHoldInsta-touch memory (access three most commonly dialed numbers with one touch and up to 10 additional memory locations with two touches)Monitor handsfreeLine poweredBlackITT3693BK