3300 Series. Soft key technology, message waiting light and data port. TouchLite® one-touch message retrieval. 5 guest service keys with secure programming (memory key entry - maximum 32 digits). On-hook pre-dialing on memory keys. Hold, Redial, Speaker, Mute, Conference and Flash keys. Ringer/handset volume control. ADA and Hearing Aid Compliant. Color insert optional with minimum order and upcharge..