Hearing Aid Rechargeable Sound Amplifier Ear Digital Earphones Tecnologia Audifono Wireless Headphones First Aid

Coolbe: The information about the product is provided by the seller. Notwithstanding any of this information, the product is not intended for diagnosis, cure, mitigation, treatment or prevention of any disease, is not a drug or a medical device, and should not be used for any medical purposes. Please consult a medical specialist.

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Hearing Aid Rechargeable Sound Amplifier Ear Digital Earphones Tecnologia Audifono Wireless Headphones First Aid

Features: 1.Discreet thin-wire design 2.High and low tone control 3.Left & right ear adjustability

Specification: 1.Product size:43x15x10 mm 2.Weight:4 g 3..Max. saturation sound pressure level(SSPL):130dB±4dB 4..Model Number: 203S 5.Full on Acoustic Gain:F=1600Hz,45±5dB 6.Total Harmonic Distortion(THD):F>1000H  15% F<1000H  10% 7.Frequency Response:450-3500 Hz 8.Equivalent Input Noise:32 dB 9.Battery: Rechargeable 10.Estimated Battery Life:48 Hours 11.Rated Voltage:D.C 1.5V

Prompt: There are Whistle as you put the battery into the hearing aid .Please donot worry .because the air presure will make Whistle. ​1.Please adjust lower volume . ​2.Choose the suitable ear plug ​3.Make sure if you put the earplug tightly,sound leak will make the Whistle.