F-16 Hearing Aid Sound Amplifier Pocket-sized Case Portable Mini Ear Mount Amplifier Receiver Hearing Aid for Adults Features: 1. Compact and portable: Since it's so small and lightweight, this product doesn't take up much space and can be easily carried. 2. Durable material: This product is made of high-quality material, durable, long lifespan, stable and reliable in use. 3. Clear sound experience: This hearing aid can help restore your hearing and give you a way to live. 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 simple to use anytime and anywhere. It has the advantages of being compact, durable, and sweat-proof. Description: Hearing aids are easy to use, allowing more natural sound and giving you an amazing experience. Specifications: Color: Black Material: ABS Size: 6.6x4.3x1.6cm Maximum Sound Output: 1295dB Maximum Sound Amplification: 55dB5dB Harmonic Distortion: 5% Frequency Range: 450~3500 hz Input Noise: 30dB Battery: 5 AAA battery (included) Operating Voltage: 1.5V Operating Current: 4mA Package includes: 1 * Amplifier Receiver 4 * Ear Plugs (various sizes) 1 * Battery 1 * User Manual 1 * Case Notes: 1. Allow for 0-1 inch measurement errors due to manual measurement. Thank you for your understanding. 2. Screens are not calibrated the same way, the object color shown on photos may look slightly different from the actual object.