Bought this phone for my wife's grandmother which is very hard of hearing and it is clear and loud enough for her to use. The buttons also have good clear large numbers.
We have had no problems walking to the sidewalk or next door and maintaining phone contact with the base. I routinely take the cordless handset while working in the yard or garage; our older model had some disruptions but this new model is much improved.
The AT&T - DECT 6.0 Expandable Cordless Phone has a range exceeding 150 ft., although I have not measured it accurately. I live in a large 4-BR home about 2800 sq.ft., and I can use the cordless hadnset anywhere in the house.