Panasonic 5.8 Ghz Silver Cordless Phone (KX-TGA600S) Additional Cordless Handset and Charger for KX-TG6000 Cordless Phone Series / Color: Silver
Customer Review: Panasonic cordless handset
I was very disappointed in this handset. I have returned two of them so far as they would not charge. I even replaced the batteries with no luck.

Customer Review: Panasonic KX-TGA600S 5.8 GHz Cordless Telephone Additional Handset
Love this phone. I had the main base & another phone & wanted to add to it. It sets up easily & works great. I love being able to plug in a phone anywhere without a phone jack.

AT&T SL82558 DECT 6.0 Expandable Cordless Phone with Digital Answering System - 1 Base, 4 chargers, 5 Handsets The AT&T SL82558 DECT 6.0 Phone System features digital answering, Caller ID, extended range with proprietary antenna technology, DECT 6.0 digital technology, five handsets (expandable up to 12 handsets) and handset speakerphone.
Customer Review: Best Phone I’ve ever owned!
Great sound quality, even with my chattering kids in the background. Has all of the features I want and stores numbers in a central directory. Love the intercom function as well. No quality issues identified so far. Cool design and comfortable to use. Good answering machine as well.
Customer Review: Very nice system, which works great even if you have a wireless computer network.
I have a computer wireless network which caused a lot of popping noises and static when I had a 5.8 GHz Uniden cordless phone system. After a lot of reading and research I bought this AT&T model. And guess what? It really IS clear! No more static. The people I call tell me that my voice is much clearer than before, too. I also like that you only have to enter each phone number into your directory once, and it is automatically added to every handset you own.