With the Panasonic KX-TGA290B 2.4 GHz FHSS GigaRange Cordless Handset you can expand communication and security in your home. This handset has onboard controls for an ADT Safewatch 3000 system, while the Caller ID and Call Waiting lets you know who's calling. Up to 5-way conferencing Navigator key Phone book sharing 4-line backlit LCD on handset 50-station phone book & dialer station 2-way intercom 6 selectable ringtones Lighted handset keypad Low battery indicator 3-level handset volume control Wall-mountable Headset jack & belt clip included Replacement Battery - HHR-P402 Note - This unit will only work with the KX-TG2970B System.