Features: Single line; Speakerphone; Caller ID; Delete Key for CID message files; 5 Programmable feature keys; Data port; One-touch voice mail retireval lightbar; Centrex/PBX compatible; Hands-free speakerphone key; Volume control key; Flash key; Hold key; Redial key; Mute key; Transfer/Conference key. HAC/ADA-Compliant Volume control; OFF/HI/LO Ringer control.