ViSYS™ four-line cordless phone works great alone or build your own system. Wirelessly connects to RCA four-line 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). Lines: 4; Telephone Type: Cordless.