Panasonic offers this KX-TGA270S 2.4GHz Cordless Handset. You can use multiple handsets without worry of cross-talk or eavesdropping because the FHSS technology randomly changes frequencies several times per second. This Handset features Privacy Mode. You can block all other handsets from joining in on the conversation. This feature automatically shuts off when the call is completed. 4-Way Conferencing allows for conference in one outside line on up to 4 handsets simultaneously with the MultiTalk Expandable System. You can quickly and easily conference in on an existing conversation between another handset and an outside line. From the base unit or a handset, you can call any other extension in the system. From the base unit or a handset, you can call any other extension in the system. 4-Line Backlit LCD on Handset shows Call Status, Programming Options, Directory Items, and if you subscribe, up to 3 lines of Caller ID information, so there's no need for scrolling. Backlighting greatly aids visibility especially in low light areas. Share the names and phone numbers programmed in one handset with any other handset in the system. 6-Selectable Ring tones allow for personalizing your ring tone to alert you when there is an incoming call.