The cause of howling/noise: To make a small size hearing aid, the internal amplifier and the microphone are close to each other. The sound is continuously received and extended, so it has a certain possibility of producing howling after power-on.

QTY: 1X
Sound Processing: Analog
Features: Replaceable Battery
Bundle Listing: Yes
Maximum sound output: 130, /- 5dB
Sound gain: ≥ 50dB
Frequency range: 300Hz ~ 4000Hz
Total harmonic wave distortion: ≤5%
Battery Type: AG13 button cell battery (included)
Original box: Yes
Input noise: ≤30dB
Brand: Unbranded
Type: Hearing Amplifier
Hearing Aid Fitting: Behind the Ear (BTE)
Items Included: Hearing Aid Battery, Hearing Aid Case
Labels & Certifications: CE Certificate