Expandable phone system with 1 corded and 3 cordless handsets is ideal for any home or office space DECT 6.0 digital transmission technology delivers excellent sound quality, security, and range Interference-free system does not get affected by wireless networks or other electronic devices, giving you crystal-clear conversations Digital security feature offers protection from identity theft by digitizing and encrypting your calls, virtually eliminating the possibility of somebody eavesdropping I