Digital Smart Noise Reduction CIC Hearing Aid Adjustable Sound Amplifier For The Elderly

Digital Smart Noise Reduction CIC Hearing Aid Adjustable Sound Amplifier For The Elderly 1. Small size, no weight when wearing 2. Low power consumption, high fidelity, high-quality chip, 3. With the volume control button, you can adjust the volume to meet your needs and preferences. 4. Adopt digital circuit, automatic noise reduction technology, and natural sound, bringing you a comfortable experience. Parameters: 1. Maximum sound output: 122+- 3dB 2. Sound gain: greater than or equal to 28dB+- 2dB 3. Total harmonic distortion: less than or equal to 3% 4. Frequency range: 300- 4800MHz 5. Input noise: less than or equal to 26dB 6. Voltage: d.c. 1.4V 7. Current: less than or equal to 1.2mA 8. Use A10 battery for 5~7 days