Intertel Axxess 520.4300 Speaker Phone (Charcoal/Refurbished)This Inter tel Axxess 520. 4300 basic phone has speakerphone capability and 8 programmable buttons, which can be used for lines or features. Key Features: 8 Push Buttons Reversible Base for Wall Mounting 8 lines Speakerphone, answer, hold, transfer, redial, speed dial, mute, message, forward, volume control, intercom Compatibility: Works with the Intertel Axxent and Axxess telephone systems.