Links up to 2 smartphones via Bluetooth(R) to make & receive cellular/smartphone calls anywhere in the house–no landline required; Easily blocks up to 250 telemarketers, robocalls & other bothersome numbers with dedicated 1-touch call block buttons on base unit & handset; Clear Talking Caller ID alerts in Eng/Sp from base unit & handsets; Includes voice paging, remote voice assist, full duplex speakerphone, power backup option, baby monitor, noise reduction & more;