This Panasonic DECT 6.0 Cordless Phone is an expansion Panasonic Cordless Handset for KX-TG4000 Series base units. Using the DECT 6.0 Plus technology for excellent reliability, this handset is designed to meet the demands of modern business communications while offering the flexibility of a cordless phone. Panasonic''s DECT 6.0 Cordless Phone Headset KX-TGA401B provides four-way conferencing ability. This feature allows individuals to remain at their own desks during those important meetings with the convenience of access to their own office and computing environment, as well as a more private setting. Panasonic''s DECT 6.0 Cordless Phone also allows the use of up to six individual handsets within a single base unit environment.