The HA-40 is the most powerful in-line amplifier available, making calls up to 40 dB! Works with virtually all home and office telephones.

• Designed for people with mild to severe hearing loss
• Increases incoming sounds up to 40 dB louder
• Adjustable tone control amplifies specific frequency range for sound clarity and distinction between similar sounding words like "chair" and "share"
• Compatible with most home and office telephones
• Connects easily between handset and phone base, no wiring involved
• Compact and portable, take it with you everywhere
• Battery included
• 1 Year Manufacturers Warranty