Simulated box hearing aid

1、Accessories: Main unit (1) USB cable (1) USB charging head, European standard round plug, American standard flat plug (1) base (1) brush (1) earplugs (6) English manual 2、Output power: 3.6mW 3、Maximum sound output ≤123 5 dB 4、Sound gain: 33±5 dB 5、Frequency range: 100--370 Hz 6、Equivalent input noise: ≤32 dB 7、Harmonic distortion: ≤10% 8、Continuous working: ≤15 hours 9、Battery capacity: 40 mA battery is a rechargeable battery 10、Working current: ≤1 mA 11、Working voltage: 1.2V 12、Speaker impedance: 110 ohms