1. Sound output: 124-134dB 2. Sound gain: 26-36dB 3. Total harmonic distortion: 3% 4. Frequency range: 300-3500MHz 5. Input noise: 32dB 6. Voltage: 1.5V 7. Current: 2mA 8. Charging box battery capacity: 300mAh 9. Charging box size: 7 x 7 x 3 cm 10. Hearing aid size: 1.2 x 2.4 cm 11. The charging box can be charged 5 times, extending the working hours of the hearing aid for 250 hours
