Products features from Amazon website:
FIIL provides high quality hearing amplifiers which are approval of US FDA with High performance.
- Noise Reduction Function
- Output Limiting Function
- Four different Amplification Programs
- 16 Volume Adjustments
- So mini that is nearly Invisible
- Battery size 312
- 6 Earplugs (3 sizes for different size ears)
- 2 Catheters (the catheter with blue characters is for your left ear, red for right)
- 2 Batteries
- Clean brush (for cleaning the hearing amplifier)
- Q&A poster (to solve the problem you may face)
The FIIL Hearing Amplifier has disposable batteries, volume control, listening programs, and noise reduction.