The panasonic kx tg 7321 eg dect is a value added cordless phone with an ergonomic handset design 20 minute answering machine three line amber backlit display and 100 name and number phonebook it also features 16 polyphonic ringer tones speakerphone and lighted keypadthe rtx repeater is a signal booster that allow you to pair up to gap compatible phones now bundled with 3 rtx repeaters these together will be ideal for large buildings such as warehouses or for buildings with very thick wal