purchase for a hearing impaired person, the sound with the booster is of rather poor quality (screaming) for a hearing impairment who has trouble distinguishing frequency is not very helped in his understanding, the speaker mode is useful but it is not better than some other standard brands models (not reserved for the hearing impaired. On the positive, one can transfer his address book (one by one !!!). I think doro plays the medical side but they have to hire a few young engineers to optimize their products.
