Cordless phone and answering system is expandable to 12 handsets through a single phone jack. Connect to CELL™ capability allows you to pair up to four Bluetooth® cell phones to the system. Once paired, you can manage calls from either handsets or cell phones. Handsets feature Push-to-Talk and intercom between handsets. System has a long coverage range and HD audio for impeccable audio quality. Answering System: Digital; Lines: 1.