Doosl Hearing Amplifier leverage technology from years of expertise to bring clarity to your hearing so you can enjoy the world around you again. This rechargeable, Receiver-in-the-canal(RIC), digital Hearing Amplifier gives you crisp and clear sound when you need it most. With intelligent noise reduction chip provides natural sound, this Doosl Hearing Amplifier is great choice to mild to moderate hearing loss, No more missing out on conversations with friends and family.
There will be high pitching sound/whistling if you did not use the Personal Sound Amplifiers correctly, and it's common for all kinds of Amplifier Devices and Personal Sound Amplifiers.
To get rid of the whistling, please follow our instructions about the insertion and adjustment:
1. Set the volume at the lowest level.
2. Choose the most comfortable ear dome for your ear. Make sure there is no air go through your ear canal.
3. Wear the Amplifier Devices before turning on the device.
4. Adjust the volume according to the environment until you can hear clearly.
1 x Amplifier Devices
6 x Replacement Earplugs
1 x Brush
1 x USB Cable
1 x Recharging Base
1 x User Manual