Have a client with a hearing impaired employee who is also soft-spoken. Company uses a TDA200.

Been looking for a third-party handset that has amplified voice (mouthpiece) AND/OR sound (earpiece) that works with a Panasonic 7600 series digital telephone set. Amplified headset is NOT an option. Do not want to switch them to a single line device on the TDA.

Have found only amplified handsets for the earpiece (ex: Clarity W6KMEM80RP). Any other suggestions? Thanks!