Ameriphone XL-50 amplified phone.

A distinguishing feature of this 48+ (100 times) amplified telephone is its automatic amplification setting. It gives the option of turning on automatically or manually when the handset is picked up. This prevents normal hearing people from receiving unexpected amplified sound.
Specifications:

• Powerful amplifier increases incoming sounds up to 48 dB for extra loud and clear conversations.
• Adjustable Tone Control lets you customize the amplifier for optimum word clarity. It makes similar sounding words crystal clear and easier to understand.
• Amplifier can be set to turn on automatically or manually every time you lift the handset.
• Audio output jack for connection to headset, neckloop or cochlear implant.
• Digital design minimizes background noise and enhances speech clarity.
• Extra bright ring flasher and super loud ringer ( 95 + dB ) with adjustable tone let you know when your phone is ringing.
• Bright voice mail indicator lets you know you have messages waiting for you.
• Missed Call Indicator lets you know that you have missed a call.
• "Extension in use" indicator lets you know when the extension phone is being used.
• Backlit, big buttons make dialing easy.
• Hearing aid T-coil compatible handset.
• 12 memory buttons for one-touch speed dialing.
• Redial, Hold and Flash buttons.
• Desk or wall mounting.
• Battery back up in case of power outage (battery not included). Adjustable Tone Control lets you customize the amplifier for optimum word clarity. It makes similar sounding words crystal clear and easier to understand.