Individual adjustment to the ear canalErgonomic fit behind the ear3 attachments to individually adjust to the ear canalFrequency range: 200 to 5000 Hz Amplification: max. 40 dB Maximum volume of 128 dB
How To Use
1.Open the battery compartment on the sound amplifier.2.Insert the button cell batteries (included with purchase). 3.Close the battery compartment, then connect your desired earplug to the headphones. 4.Bring the sound amplifier up to your ear as shown. Slowly insert the earplug into your ear canal applying no force. Make sure not to insert the earplug too deeply into the ear canal
