Check the listing for details. OTE Digital Hearing Aids - Push Button Volume Control. Condition: New. Listed at 99.00 USD. OTE Digital Hearing Aids - Push Button Volume Control. Condition is New. Shipped with USPS First Class Package. - 100% Digital processing for exceptional sound quality- 2 channels WDRC amplifier- 12bands frequancy shaping- Low level expansion- Low battery warning- Earhook design, easy operating- Memory switch tone- Rocker volume control- Low frequancy cut trimmer- MPO trimmer- Output Compression Limiting(AGC-O)- Low current consumption Housing Design: BTEPeak OSPL90(dB SPL): 134 OSPL90-HFA(dB SPL) : 127Peak Gain(dB): 60HFA/FOG(dB): 50Reference test gain(dB): 50Frequency Range(Hz): 200-4200EQ input noise(dB): 23Battery Size: 13ABattery Current(mA): 0.86 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 to not 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, and I am 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 afford 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.