F138 Rechargeable Digital Hearing Aid Ear Severe Loss Invisible Sound Amplifier High-Power Hearing Aids For Deafness Elderly

Best sound amplifier adjustable tone hearing aid. Super mini size and light weight, not easily to be seen. Adjust volume to the minimum before wearing. Choose an earplug of slightly bigger size to avoid whistler. Increase volume gradually to avoid sudden increase in sound. If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. Keep the ear plug clean.

Type: Hearing Aid Max. Sound Output: 129dB ? 4dB Max. Sound Gain: 50dB ? 5dB Harmonic Wave Distortion: ≤5% Frequency Range: 450~3500hz Input Noise: ≤30dB Battery: AG13 Button Battery (Included) Working Voltage: 1.5V Working Current: ≤4mA Features: BTE Hearing Aid, Lightweight, Comfortable Fit Dimension: 6.75cm x 4.35cm x 1.9cm/2.66"" x 1.71"" x 0.75"" (Approx.)

Notes: Remove the battery if you don't use it for long time. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.

Package Includes: 1 x Hearing Aid 3 x Earplugs(Different Sizes) 2 x AG13 Button Batteries 1 x User manual