Model Number:Hearing Aid Certification:NONE Maximum saturation sound pressure level:1150B+3dB Average saturation sound pressure (OSPL9O):110dB4dB Maximum gain:35dB5dB Average gain:30dB5dB Equivalent input noise level:29dB+3dB Frequency response range:300Hz~3200HZ Total harmonic distortion:10% Battery:A10 zinc air battery Life time:72-96 hours Rated current:2.5mA Size:16*16*10mm / 0.6*0.6*0.4inch Features1:Small and invisible Features2:Now you can hear friends and family clearly again. Features3:Comfortable hearing aids Features: 1. Small and invisible: The hearing aid is small and light, you will hardly notice that you are wearing it. It is located in the ear canal and is comfortable to wear. 2. Sound: The elite sound quality of this device can achieve natural, non-muffling sound. Now you can hear friends and family clearly again. 3. 1.5m anti-drop: the hearing aid supports 1.5m anti-drop, it can still work normally when dropped naturally, use it with confidence. 4. Function: Hearing aids can help you watch movies, appreciate drama, attend meetings, and attend classes. But if you want to hear a very slight sound, that would be a good choice. 5. Comfortable hearing aids: Use brand new and modern earplugs to provide you with maximum comfort and reduce congestion caused by ear wax accumulation. Description: Hearing aids are easy to use, comfortable and easy to use, and can help you hear your voice clearly and loudly. Specifications: Maximum saturation sound pressure level: 1150B+3dB Average saturation sound pressure (OSPL9O): 110dB4dB Maximum gain: 35dB5dB Average gain: 30dB5dB Equivalent input noise level: 29dB+3dB Frequency response range: 300Hz~3200HZ Total harmonic distortion: 10% Battery: A10 zinc air battery Life time: 72-96 hours Rated current: 2.5mA Certification: FDA. CE Size: 16*16*10mm / 0.6*0.6*0.4inch Package Included: 1 * Hearing Aid 3 * Earplugs 2 * 2A10 Zinc Air Battery 1 * Cleaning Brush 1 * Instruction Manual 1 * Packing Box 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.