1pair Invisible In-Ear Hearing Aid Sound Amplifier For The Elderly And Hearing Impaired<br> 1. This hearing aid is designed for the elderly or people with hearing problems, suitable for those with hearing loss or patients.<br> 2. Low power consumption, high fidelity, high-quality chips, invisible flesh-colored surface will not appear out of place in the crowd.<br> 3. With volume control function, you can adjust the volume to meet your own needs and preferences.<br> 4. Built-in battery power supply, smaller, simpler, more convenient, more powerful and more stable.<br> 5. Adopt digital circuit, automatic noise reduction technology, natural sound, bring you a comfortable experience.<br> 6. Ergonomic earplug design, no pain even if worn for a long time.<br> Specifications:<br> 1. Material: Plastic<br> 2. Battery: 1 A10 battery, 1.4V, 1.2mA<br> 3. Sound output MAX: 122+-3dB<br> 4. Sound gain: greater than or equal to 28dB+-2dB<br> 5. Total harmonic distortion: less than or equal to 3%<br> 6. Frequency range: 300-4800MHz<br> 7. Input noise: less than or equal to 26dB<br> Note: To prevent accidental swallowing by children, keep small parts out of reach of children.