The existing hard of hearing telephone that my father has is made by Doro and has two sticky keys. Following a move I decided to get him a new hard of hearing telephone with a wireless extension. There is nothing generally wrong with the telephone or wireless extension supplied. The amplification however is very poor when compared to the Doro telephone. My father could hardly hear the incoming call with the amplification on its highest level. He also had difficulty hearing it using his hearing aid. The Doro is significantly louder and my father does not need to have it anywhere near full volume. To describe the new telephone as designed for the hard of hearing is incorrect. It is only engineered for people with a partial loss of hearing. We are now going to have to buy a new Doro as the one that we purchased is not fit for purpose.