2pcs ear hearing device with removable chargingcase. 57dB peakgain, suitable for mild to moderate hearing loss (Reference hearing loss map). Biomimetic designed for hearing impaired, more fitting the earcanal, do not feel pain even when worn for a long time. Volume adjustable, lightweight and the compact structure fits for put into your pocket and carry around with you. Comes with 6pcs/3pairs earplugs to reduce howling and noise, you can choose the fittest one. Features: Binaural design, you can find the direction of sounds accurately. 57dB peakgain, suitable for mild to moderate hearing loss (Reference hearing loss map). Rechargeable and removable charging, charge the removable chargingcase first, you can use it to recharge hearing aids twice. The removable chargingcase can charge the hearing aids 2 times, and 2 hours each time. Biomimetic designed for hearing impaired, more fitting the earcanal, do not feel pain even when worn for a long time. Low power consumption, high-fidelity material, fine quality chip, provides 2 colors for you to choose. This affordable hearing aids have volume control, can adjust the volume to fit your own needs and preferences. Precisely small and lightweight, and the compact structure fits for put into your pocket and carry around with you. Comes with 6pcs/3pairs earplugs to reduce howling and noise, you can choose the fittest one. Specifications: Name: Hearing Aids Color: black, white (optional) Battery: 1 * 4.2V, 30mAh battery (included) Max OSPL90: 118dB+3dB Average OSPL90: 113dB+4dB Maximum Sound Gain: 35dB+5dB Average Sound Gain: 30dB+5dB Work Current: 5mA Equivalent Input Noise: 29dB+3dB Total Harmonic Distortion: 10% Frequency Response: 300Hz-4500Hz Item size: Hearing device size: 25 * 22mm / 0.98 * 0.87in Case size: 58 * 38 * 26mm / 2.28 * 1.50 * 1.02in Package size: 100 * 100 * 50mm / 3.94 * 3.94 * 1.97in Package weight: 185g / 6.53ounce Packing List: 1 * Hearing Aids (a pair,2pcs) 1 * Chargingcase 6 * Earmuffs(different sizes, 6pcs/3pairs) 1 * Cable 1 * Cleaning Brush 1 * Volume Adjustment Bracket 1 * Guideline