Nita.... I found the other catalog that lists the voice amplifiers. Info follows: <and it's an all round untrusting catalog of useful items> Call BRUCE Health & Medical Supplier 1(800) 225-8446 The voice amplifiers (and there's 3 different models and 3 different prices, of which I tried two - the $159 was a loser because it SHREEEEEKed. The $259 model is working well and I'm pleased with it, I'm saving for the $650 unit tho 'cause THAT ones the size of a credit card and ONLY transmits the human voice. The mid-range unit's just fine tho... See page 36 'n page 39 for two of the three units they handle, and sorry, you'll hafta find the third unit yerself. I know it's either there, or in that other catalog I emailed ya about . Barb Mallut [log in to unmask]