DECT 6.0 is the newest cordless phone technology and provides Enhanced Security, Greater Range, Longer Battery Life and Interference Free Calls. DECT 6.0 phones provide voice encryption to protect you from eavesdropping, cordless phones can be used much further from the base unit than other cordless phones, they're more energy efficient than other cordless phones and have a battery life that lasts 30% longer and all DECT 6.0 phones are interference-free. Wifi networks, baby monitors, and other devices will not affect phone call audio quality.