ViSYS™ four-line cordless phone works great alone or build your own system. Wirelessly connects to all RCA four-line corded phones to build your perfect phone system of up to 16 devices. Enjoy intercom, cordless flexibility and advanced call management features. Functions as an independent four-line cordless telephone. Features call waiting/caller ID, intercom and call conferencing. Includes call transfer, 50 phonebook name/number memory and multilingual message display (English, French and Spanish). 40 name and number caller ID memory with caller ID review and delete. Includes Do Not Disturb feature, flash and hold functions. Also line-in use indicator, line status indicator and one touch redial. Voice mail system with ringer control and visual ringer. Automatic date and time set with caller ID review and delete, plus dial back function.