Expandable cordless phone system features link2cell technology to sync your cell or smart phone and allow you to make or take cell calls directly from the handset. Advanced answering device function automatically sends a message to a registered cell or office phone along with playback options to deliver messages whether you're at home or on the road. Enhanced noise reduction suppresses background noise around your caller while enhancing their voice for clearer calls. A powerful battery backup system keeps you connected when the power goes out. DECT 6.0 Plus technology improves your transmission quality and range by increasing the frequency of error correction up to 80 times. Talking Caller ID clearly announces the name of your caller so you know who's calling without getting up. 1.8" backlit display lets you see who's calling at a glance even from a short distance away. Eco mode automatically reduces power consumption to extend your talk time and prevent frequent charging.