Make and receive phone calls with this expansion desk set. The system includes caller ID, call waiting and conference calling for call management, and the extra-large LCD display makes it easy to read the numbers you are calling. This VTech expansion desk set has a single-button voice mail to save time. Please Note: This is an extension phone, it requires a base station, item CM18445 to function. Extension phone wirelessly connects to the CM18445 base station with one touch, so you can install an entire office system in minutes. Please Note: This is an extension phone, it requires a base station, item CM18445 to function. Compatible with up to four lines for expanded calling capabilities. Reliable DECT 6. 0 digital technology enhances audio quality for ultra-clear, buzz-free communication. 1. 9GHz frequency band provides superior quality of voice and sound, high protection against wiretapping, and excellent range, while not interfering with wireless routers. Extra large monochrome LCD display for clear viewing. Digital answering system records up to 180 shared minutes of incoming messages, outgoing announcements, and memos. Full-duplex speakerphone increases participation by allowing both ends to speak and be heard at the same time, for conversations that are more true to life. Program the system to answer outside calls, provide callers with a company directory, automatically forward calls to specific extensions, and let callers record voice messages when there is no answer any time of the day or night. Provides intuitive and efficient interaction by new call/message and line-status indicators, rapid scroll, and one-button functions access: delete (message/call history record/digits), speed dial (32 settings), hold, transfer, intercom, auto redial, page, speaker, and DND (do not disturb). Provides up to 7. 9 hours of talk time (3. 8 hours in a speakerphone mode). Caller ID/call waiting lets you see who is calling. Wall mount supported. TIA-1083 compliant phone has reduced noise and interference when used with most T-coil equipped hearing aids and cochlear implants. 2-year manufacturer limited warranty. Safety Data Sheet . Upgrade your existing office phone system with this four-line VTech small business expansion desk set.