1. Max sound output: ≥120dB
2. Sound gain: ≥30dB
3. Total harmonic wave distortion: ≤10%
4. Frequency range: 300-4000Hz
5. Input noise: ≤40dB
6. Voltage: DC1.5V
7. Current: ≤4mA
8. Color: As pictures
Package Included:
1 x Hearing Aids
1 x User Manual
1 x Case
2 x AG3 Button Cells
3 x Units of earplug of different size