Telephone Amplifier with Booster Button and Tone Control

Product Features

• Receiving volume control up to 30dB and up to 40 dB gain with "boost" volume button
• Receiving tone control: Bass -10dB max, Treble -10dB max
• Light and portable
• Handset matching switch (12 positions), ensures compatibility with 99% of telephones
• Sleek modern design
• Simple connection