Have been trying to use a new phone system in a noisey industrial environment and the volume level wasn't cutting it. I found the HA40 product, it was hoped that it might enable us to use the phones like anywhere else. And after 2 weeks use, I can say it works great! Callers voices are loud and clear at low boost settings (2/4 bars)! I think we need to order some more of these. Works very well for us. Running off original 9V battery - would be nice to have a wall-wart option to avoid the need for batteries. Thank you.
Portable Telephone Handset Amplifier
The Clarity HA40 Portable Telephone Handset Amplifier featuring Clarity® Power™ technology makes telephone conversations not only louder, but also clearer and easier to understand.
- Clarity® Power™ technology
- Increases incoming sounds up to 40 decibels
- Adjustable incoming volume control
- Adjustable tone control (600-2400Hz)
- Boost button allows for even more amplification and eliminates background noise and feedback by muting the microphone in the handset
- Connects easily between handset and telephone base
- Great for home, office or travel
- Works with any phone where the handset is separate from the keypad