1. Intelligent Digital Signal Processing. Digital multifunction chip
2. Low-frequency noise reduction technology, P comfort adjustment function
3. Volume switch automatic memory
4.2 kinds of listening mode (soft / loud)
5. Mini appearance, digital buttons, simple operation, stable powerful output
6. Suitable for patients with moderate to severe hearing loss
Peak OSPL90 (dB SPL): ≤132dB + 3dB
High Frequency Mean: 127dB ± 4dB
Peak Gain (dB): 50dB ± 5dB
Equivalent Input Noise: ≤32dB
Total Harmonic Distortion: ≤5%
Frequency Response Range: 450Hz ~ 3000Hz
Rated Power Supply Current Consumption: ≤5mA
Battery: AG13 Button battery (Included)
Color: As the picture shows
1 x D-303 Digital Hearing aid
4 x Earplug (different sizes)
2 x Ear Tube
2 x AG13 button cell battery
1 x User manual
1 x Box
About Whistle , you can do this 3 steps to remove it.
1. Choose a suitable earplug to make the product sealed in the ear canal
2. Low down the sound volume
3. When you put into battery , please be quick , to put the product into the ear
Adjust volume to the minimum before wearing.
Choose an earplug of slightly bigger size to avoid whistler.
Increase volume gradually to avoid sudden increase in sound.
Keep the ear plug clean
Remove the battery if you don't use it for long time.