Origin:China MainlandModel Number:B01 Hearing Aid Batteries:A10 Type:CIC hearing aid Fit for:Less than 80Db sound gain:42db Frequency range:250H~4500Hz Digital Hearing Aids:hearing aid ear hearing aid:More durable Wireless Headphones:More comfortable Digital Hearing aid in the Ear,Intelligent Audifono Programmable,Sound Amplifier, First Aids For Deafness Elderly Features: Comfortable CIC model, nearly invisible,easy to use Extremely easy to use and adjust with large buttons Powerful enough to help almost any level of hearing loss Easy to use volume buttons Frequency controls for unique environments Automatic Noise Reduction capabilities Automatic Feedback Canceller Product Details: 1.Peak OSPL 90 (dB SPL): 114.6dB 2.HAF OSPL 90 (dB SPL): 112.7dB 3.Peak gain (dB): 36dB 4.HAF / FOG gain (dB): 32dB 5.Frequency range (Hz): 2000-7770Hz 6.distortion : 7.500Hz: 1.6% 8.800Hz: 1.7% 9.1600Hz: 0.6% Many inconveniences on daily life, I need a hearing aid urgently. Our products are certified by authoritative organizations, formal production plants, and customer satisfaction evaluations! Easy to useOpen the door, use the tip of the magnetic brush to pick up the battery, insert the battery, close the door, and identify the volume knob next to the microphone. Prompt: ThereareWhistleasyouputthebatteryintothehearingaid. Pleasedonotworry.becausetheairpresurewillmakeWhistle. 1.Pleaseadjustlowervolume. 2.Choosethesuitableearplug 3.Makesureifyouputtheearplugtightly,soundleakwillmaketheWhistle.