The Panasonic KX-TS4200B 4-line combined phone system is expandable up to 16 stations. Included with latest business features, it includes a speakerphone, call waiting/caller ID and the ability to expand to a multi-unit system without a central switching unit. This KX-TS4200B can be networked into a system of up to 16 phones without the need for an expensive PBX or key phone system. All the features you need, such as transfer, intercom, conference and hold, are built into this phone. This Panasonic phone also has a 200-station phonebook and caller ID memory with dialer and power outage operation. KX-TS4200B Features: Corded Phone System 4-Line Operation Caller ID / Call Waiting Expandable Up To 16 Stations Wall Mountable Speakerphone Backlit LCD Display 200 Station Name / Number Caller ID Memory 200 Station Phone Directory / Dialer 3-Way Conferencing 32 One-Touch Memory Buttons 24-Digit Per Station Dialer Storage Capacity Power Failure Protection Message Waiting Indicator Line Selection Group / Prime / Auto 8-Step Speakerphone Volume Control 5-Step Volume Control 4-Step Ringer Volume Control Intercom Call Transfer 6 Number Redial Hold Mute Flash Do Not Disturb Real Time Clock AM / PM Format 2 Desktop Angle Choices 2.5mm Headset Jack Bilingual Menu Support (English / Spanish) Brand New Includes One Year Warranty !