Features: 1. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. 2. Durable material: This product is made of high-quality material, durable, long service time, firm and stable in use. 3. Clear sound experience: This hearing aid can help you restore your hearing and give you a way of life. 4. Invisible design: The size of the personal hearing aid is so small that it can be hidden in the ear canal, so no one can easily see and hide it. 5. Lightweight and comfortable: Lightweight, easy to carry, and easy to use anytime, anywhere. It has the advantages of being miniature, durable and sweatproof. Description: Hearing aids are easy to use, sound more natural, and provide you with a wonderful experience. Specifications: Color: black Material: ABS Size: 6.6x4.3x1.6cm Maximum sound output: 129±5dB Maximum sound gain: 55dB±5dB Harmonic distortion: ≤5% Frequency range: 450~3500 hz Input noise: ≤30dB Battery: 5 dry battery (included) Working voltage: 1.5V Working current: ≤4mA Package Included: 1 * Amplifier Receiver 4 * Earplugs (different sizes) 1 * Battery 1 * User Manual 1 * Box