1. Max sound output : 110≤5dB
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 includes :
1 x K-80 Hearing Aids
1 x User Manual
1 x Case
2 x AG3 Button Cells
4 x Units of earplug of different size