Origin:China Mainland
Model Number:battery not include

Features: The cause of howling/noise:The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Ways to avoid howling/noise: 1. When the power is high (the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume from low can effectively avoid howling. 2. When the ear canal is completely sealed, there is no howling sound. Therefore, please use hearing aids after cleaning your ear canal, and test the earplugs from large to small to find the most suitable earplugs. 3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, and then release it to fully extend the earplug. Description: Small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Specifications: MaxSound output: 130 ± 5 dB Maximum sound gain: 55 ± 5 dB Harmonic distortion: ≤ 10% (1000Hz) Frequency: 300-4500Hz Input noise: ≤ 30 dB Battery: AG13 button battery(not included) Working voltage: dc1.5V working Current: ≤3mA Size: 3.8x2.1x0.9x3cm Package Included: 1pc* Hearing aid 3pcs* Earplugs 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.