You cannot imagine how horrible and miserable it would be if you had bad hearing and couldn’t hear the sound around clearly. Why not take this Digital Moderate Severe Loss Hearing Aid Sound Amplifier F136 as a gift for those who you want to show sympathy for? With full digital circuitry for natural， clear sound and great listening comfort， our hearing aid could improve sensitivity and reduce unwanted background noise. It also offers adjustable volume control and clear sound. Compact and lightweight， the hearing aid will not add any burden which results in some discomfort to ears. A perfect choice!                                    Features             Full digital circuitry for natural， clear sound and great listening comfort<br> Low power consumption for long time use<br> Adjustable volume control and clear sound<br> Compact and lightweight， add little burden to ears<br> Reduce unwanted background noise <br>                                                            Specifications             Material     Plastic    <br> Dimensions     (1.77 x 1.77 x 0.63) " / (4.5 x 4.5 x 1.6) cm (L x W x H)    <br> Color     Brown    <br> Weight     0.28 oz / 8.0 g    <br> Model     F136    <br> Max Sound Output     130 ± 5 dB    <br> Sound Gain     ≥50dB    <br> Total Harmonic Wave Distortion     ≤ 5%    <br> Frequency Range     300Hz ~4000 Hz    <br> Input Noise     ≤ 30 dB    <br> Voltage     d.c. 1.5 V    <br> Current     ≤ 4 mA       <br>                                                             Package Includes            1 x F136 hearing aids <br>5 x Earplugs (Different Sizes)<br>2 x Electronics<br>1 x Packet <br>1 x Box<br>1 x Operation Manual<br>