The Panasonic KX-TGD510B DECT 6.0 Plus Expandable Digital Cordless Phone, with 1 handset, can handle up to six handsets on the same line. This model takes on your day-to-day communication needs with caller ID, call block, silent mode, and more. This Energy Star unit has Intelligent Eco mode which automatically lowers the power consumption when you're using the handset close to the base unit. DECT 6.0 Plus technology takes superb sound quality and outstanding range to a whole new level. And with the handset locator, you'll never lose track of your handset again. One Handset Cordless Telephone with Amber Backlit Display. Sync up to 2 smartphones to make and receive cell calls throughout the house via Bluetooth . Access the convenience of Siri, Google Now and S Voice from your handsets with one-touch Voice Assist. Easily dial and manage phone functions with enlarged, amber backlit keypads and large 1.6-in. white backlit handset LCDs. Includes ringer ID, call-waiting caller ID, silent mode and intelligent eco mode. Enjoy additional conveniences including silent mode, handset locator, Intelligent Eco mode, and more!