2 in-ear hearing aids with removable charging case. The peak gain is 57dB, suitable for mild to moderate hearing loss (refer to the hearing loss chart). Bionic design, specially designed for hearing-impaired people, fits better in the ear canal and will not cause pain when worn for a long time. Adjustable volume, lightweight and compact enough to fit in your pocket and take anywhere. It reduces howling and noise, so you can choose the one that suits you best. feature: Binaural design allows you to accurately find the direction of sound. 57dB peak gain, suitable for mild to moderate hearing loss (refer to the hearing loss chart). Rechargeable and detachable charging, charge the detachable charging case first, you can use it to charge your hearing aid twice. The removable charging box can charge the hearing aid 2 times for 2 hours each time. Bionic is specially designed for the hearing-impaired and fits the ear canal better, so you wont feel pain even if you wear it for a long time. Low power consumption, high-fidelity materials, high-quality chips, 2 colors available for you to choose from. This affordable hearing aid features a volume control that lets you adjust the volume to suit your own needs and preferences. Small, lightweight and compact enough to fit in your pocket and take anywhere. Comes with 6 pieces/3 pairs of earplugs to reduce howling and noise, you can choose the one that suits you best. Specification: Name: Hearing aid Color: black, white (optional) Battery: 1 * 4.2V, 30mAh battery (included) Peak OSPL 90 (dB sound pressure level): 117 dB HAF OSPL 90 (dB sound pressure level): 109 dB Peak gain (dB): 57dB HAF/FOG gain (dB): 52dB Frequency range (Hz): 400-4500Hz Total harmonic distortion: 7% Product Size: Hearing aid size: 25*22mm/0.98*0.87in Housing size: 58*38*26mm/2.28*1.50*1.02 inches Package size: 100*100*50mm/3.94*3.94*1.97in Packaging weight: 185 g/6.53 oz packing list: 1 * Hearing aids (one pair, 2 pieces) 1*Charging box 6* earmuffs (different sizes, 6 pieces/3 pairs) 1*cable 1*Cleaning Brush 1*Volume adjustment bracket 1 * Guide