Panasonic 5.8 GHz FHSS DSS GigaRange Supreme Expandable Digital Cordless Phone System with Talking Caller ID and Digital Answering System (KX-TG5240M + 2 KX-TGA520M)) Up to 4 handsets with just one phone jack (3 included) Long Range, Clear Sound, Minimal Interference. 5.8 GHz technology will not interfere with wireless networks such as 802.11b or 802.11g WiFi. Hear Who's Calling Without Getting Up. Panasonic cordless phones are the only cordless phones to incorporate true text-to-speech technology used in conjunction with your Caller ID service. All-Digital Answering System. with up to 16 minutes of recording time and up to 3 mailboxes. Kids Sleeping? The Antenna Will Signal You Silently! So turn off the ringer, let the kids sleep, and never miss a call.