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1. This hearing aid is specially designed for the elderly or people with hearing problems, suitable for those people or patients with hearing loss. 2. Low power consumption, high fidelity, high quality chip. 3. Small in size and light in weight, it helps you get rid of the shackles of earphone wires, and is convenient for watching movies and enjoying dramas, etc. 4. Ergonomic earplug design, even if you wear it for a long time, you will not feel pain. 5. Specifications: - Power supply: button battery - Sound output: 129db - Sound gain: 50dB max - Harmonic distortion: less than 5% - Frequency range: 450-3500Hz - Input noise: less than 30dB - Voltage: DC1.5V - Working current: less than 4mA
