Designed and engineered in Japan, Unidens DECT 31xx Series uses the Wireless Friendly DECT technology. This Additional Handset has been derived from cutting-edge American DECT 6.0 Technology the DECT 31xx Cordless Phone System is nothing but a premium choice. Weve introduced a handy NEW feature to the DECT 3105 Blackout Power Failure^ Protection Feature. When a Power Failure occurs, the charged handset temporarily supplies power to the base unit. You can then make and receives calls using a handset. These futuristic styled phones are ideally suited to high density living environments and have a comprehensive array of features suitable for any home. They have enhanced talking range, unique styling, a large backlit display LCD display and are Wireless (WiFi) Network friendly. The digital duplex speakerphone on the handset makes handsfree communication a breeze. Another brilliant feature of the DECT 3105 is the DND (Do Not Disturb Function), this button allows you to mute the ringer on the handset and the base at once. Ideal for young families and shift workers.