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1. 16-channel digital hearing aid, 3 noise reduction modes, high-definition audio quality. 2. Digital display space capsule, fashionable color matching, refreshing and charming 3. 2 ways to turn on and off 4. 12 frequency bands 5. Compact and invisible behind-the-ear hearing aid 6. Open earplugs 7. Maximum saturation sound pressure level: 123db+/-3db 8. High frequency average: 113db+/-3db 9. Full-range sound gain: 40db+/-5db 10. Frequency response range: not narrower than 250Hz-7500Hz 11. Total harmonic distortion: less than or equal to 3% 12. Equivalent input noise level: less than or equal to 13 dB 13. Rated power supply current consumption: less than or equal to 2mA 14. Rated voltage: 3.7V
