by Clarity

• Compatible with home and most business phones (does not attach to Princess, Trimline, or cordless phones)
• Volume adjustable up to 30 dB
• Separate tone control improves the clarity of the incoming voice
• Pushing the Boost button reduces background noise and provides an additional 10 decibels of amplification
• Runs on 9 volt battery (included)
• One year warranty
• For more information, click here to read the User Manual (PDF format)