Panasonic KX-TG585 6.0 PLUS Expandable Digital Cordless Answering System One cordless handset with base unit;Four satellite cordless handsets; Bluetooth: Class1 support Panasonic Link2Cell Bluetooth functionality; Link up to two cell phones;No landline required Talking text message alert; One-touch call block button; Smart key function Noise reduction; Baby monitor 13 hours talk time; 12 days standby time; Battery power backup; App alert for Android