• DECT 6 • 0 two-line expandable cordless phone system is expandable to six cordless handsets and features Bluetooth compatibility • Link a headset via Bluetooth to go hands-free • You can also transfer up to 600 names and numbers from your cell phone to the built-in directory via Bluetooth • Operating in the 1 • 9GHz frequency range, phone will not conflict with other wireless devices such as 2 • 4GHz computer routers, wireless keyboards, microwave ovens and other common household devices • Silent Mode allows you to turn off the ringer on only one handset