Clarity - Good amplification on land-line and Cell phone.
Returned a similarly featured product from another manufacturer and replaced with this one by Clarity. The amplification is much better on this one for my 93 YO father. It has larger buttons too and the BlueTooth feature means he can now hear his cell phone calls when received at home.
These are a huge disappointment and ever bigger waste of money. They are slippery and hard to hold especially for elderly; the on/off buttons have multiple functions which isn't easy for a vision impaired individual to navigate. The sound volume would probably be great for hearing impaired if it weren't for all of the static/white noise. We have tried everything the manual suggests to remedy that and nothing has worked. We are going back to the previous phone we had.