Ultra convenient and easy to carry.
In the design of mini size but with low noise.
Offers comfortable silicone earplugs in 3 sizes to fit most ears.
It is beneficial for people have hearing problems.
Battery type: AG3 (Note: The battery is included in the product)
Light weight
Could be used on either ear
With volume on / off switch
1. Normal working conditions:
a) Environmental temperature: 5 � ～ 40 �
b) Humidity: ≤ 80%
c) Barometric pressure: 86 kPa ～ 106 kPa
d) Working voltage: 1.5 V DC, with a 5%, -10% relative error ( By using a AG3 button battery )
2. Eletroacoustic performance:
a) Max saturated sound pressure level: ≥120 dB
b) Full-on acoustic gain: ≥30 dB
c) Average acoustic gain: ≥18 dB
d) Harmonic distortion:
- No more than 10% when frequency less than 1000 Hz
- No more than 4% when frequency more than 1000 Hz
e) Equivalent noise: ≤ 50 dB
f) Frequency response: above 250 Hz ～3500 Hz

Note:
According to the FDA, it is in your best health interest to obtain a professional medical evaluation before purchasing a hearing aid and you are encouraged to do so before bidding on this item. If you choose not to obtain a medical evaluation before purchasing this item, I am required by law to provide to you and obtain from you a signed written waiver of the medical evaluation. I am also required to provide to you a copy of the User Instruction Brochure for a hearing aid, review the contents of that brochure with you, and allow you time to read the brochure. You must provide to me either a signed statement from a physician or a signed waiver before I will deliver this item to you. Upon your request, I will also provide to you a copy of the User Instructional Brochure for the hearing aid or the name and address of the manufacturer or distributor from whom a User Instruction.
Drugs and other items that require a prescription from a doctor, dentist, optometrist, or veterinarian aren't allowed on eBay. Listings for health care or other medical-related items are also restricted.