A:AnswerHi Zandor, thank you for your inquiry. The volume may be turned up on the main base unit; however it does not offer tone settings.
These are the Amplified models with answering machine for hearing impaired.
KX-TGM430B, KX-TGM450S
A:AnswerNOT SURE, YOU COULD TRY OR CHECK WITH BEST BUY TECH TO CONFIRM OR DENY.
I USE THE COMPANION PHONES PROVIDED, THOUGH I HAD OTHER PANASONICS, LOVE THIS PHONE AND THE CALL
BLOCK FEATURE FOR UNWANTED CALLS.