Features: Comfortable to wear: Amplifier is comfortable and safe to wear Perfect Size: Moderate size is just fitable to ears and looks concise and delicate in appearance when using it Personal-Sound Aid: Can help you attain clear and smooth-sound, which provides you more convenience in daily life Portable: Lightweight and discreets enough to fit easily in your pocket or handbag Wide Application: Suitable for hearing loss people, also can suitable for leisure and entertainment, such as watch film, TV program, the play, attend meetings or have classes and like that Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Maximum sound output: 110±5dB Sound-gain: 30dB Harmonic distortion: F＜1000HZFrequency range: 250-3800HZ Input noise: Voltage: DC 1.5V Current: Battery: AG5 button battery included Size: 2.2 * 1.9 * 1.4cm / 0.9 * 0.7 * 0.6inch Package includes: 1 x hearing aid 3 x earplugs different sizes 2 x batteries 1 x user manual 1 x packaging box Package List: 1 Set In-ear Wireless Mini Hearing Aid