The Panasonic KX-TGA660M features DECT 6.0 Plus technology, which provides the user with outstanding range and clarity. Some of the many features include a white LCD backlit color, amber lighted handset keypad, ringer and speakerphone volume, hold & mute. You can make up to 4-way conference calls and use it as a handset to handset intercom. And it also features Silent Mode, so you can turn off the handset ringer whenever you desire. You can put one in every room of your home all while using only one base and one phone jack.