1、Moderate size is just fitable to ears and looks concise and delicate in appearance when using it. 2、Can help you attain clear and smooth sound, which provides you more convenience in daily life. 3、You can increase and decrease the sound by the volume control according to your hearing habit. 4、Simple to use, no complicated program and operation, suitable for slight and intermediate hearing loss people. 5、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. Features: 1. Moderate size is just fitable to ears and looks concise and delicate in appearance when using it. 2. Can help you attain clear and smooth sound, which provides you more convenience in daily life. 3. You can increase and decrease the sound by the volume control according to your hearing habit. 4. Simple to use, no complicated program and operation, suitable for slight and intermediate hearing loss people. 5. 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. Specification: Item Type: Hearing Aid Material: ABS Battery: 2 x A10 Button Battery Power:1.3V Relative Error: +5%-10% Environmental Temperature:-10℃-+40℃ Relative Humidity:≤80% Atmospheric Pressure: 86KPa-106 Kpa MAX.SSPL(OSPL90):≤115+3 Full-on Acoustic Gain:32±5 Equivalent Input Noise Level:≤29dB+3dB Total Harmonic Distortion:≤7%+3% Frequency Response Range: 300Hz-4500Hz Package List: 1 x Hearing Aid 2 x A10 Button Battery 6 x Earplug 1 x Cleaning Brush 1 x Cleaning Screwdriver 1 x Instruction Note: 1. Keep the volume to a minimum before wearing. 2. Choose slightly larger earplugs to avoid whistling. 3. Gradually increase the volume to avoid sudden loud sounds.