Certification:CE Compatible Audio & Video Equipment Style:Amplifier Model Number:Hearing aids Input noise:50db Maximum sound gain:30db Frequency range:250~3800Hz Maximum sound output:120 db Version:English Mini Hearing Aid Small And Light Hearing Amplifier Elderly And Adult Hearing Invisible Mini Sound Amplifier Features: 1. Small and invisible: The personal hearing aid is small and light enough to hide in the ear canal, so no one can easily see it and hide it.you will hardly notice that you are wearing it. It is located in the ear canal and is so small that it is basically invisible. 2. Sound: The elite sound quality of this device can achieve natural, non-muffling sound. Now you can hear friends and family clearly again.This hearing aid can help you regain your sense of hearing and give you a way of life. 3. Lightweight and comfortable: Lightweight, easy to carry, and can be used easily anytime and anywhere. It has the advantages of miniature, durable, and sweatproof. 4. Easy to use: Hearing aids do not need to use complicated buttons. Keep it simple and effective; turn it on, set your volume preference, and you can start. Description: Hearing aids are small and invisible, comfortable and easy to use, and can help you hear your voice clearly and loudly.Lightweight, easy to carry, and can be used easily anytime and anywhere. adult hearing aids allow you to easily communicate with others . Specifications: Material: ABS Quantity: 2PCS Version: English Maximum sound output: 120 db Maximum sound gain: 30db Frequency range: 250~3800Hz Input noise: 50db Package Included: 1 pair * Hearing aids Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.