Standard Frequency : 2500Hz

Max.output sound level gain: 30±5dB

Highest sound pressure level for input SPL 90dB : 109±5dB below 125dB

Equivalent input noise level: Below 29dB

Battery Current :Below 0.8Ma

Battery Type / Life Expectancy: Button size PR-41(312) battery.

Continuous Use: 260 hours

Suitable : Not recommend for serious hearing loss.

Size: <Hearing Amplifier> 13.2(L) x12.5(W) x23.5(H)mm

     <Case> 102.8(L) x 59(W) x23.5(H)mm

Weight : <Hearing Amplifier>2.2g/ <Rechargeable Case>37.6g

Material :<Hearing Amplifier> ABS /<Rechargeable Case>ABS/<Ear Cap> silicone / <AC Adapter>ABS

"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 Instructional Brochure for the hearing aid can be obtained."