The Panasonic KX-TGD510B DECT 6.0 Plus Expandable Digital Cordless Phone, with 1 handset, expandable 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.