1. Max sound output : 110｡・dB<br />2. Sound gain : ｡ﾐ30dB<br />3. Total harmonic wave distortion : ｡・0%<br />4. Frequency range : 300-4000Hz<br />5. Input noise : ｡・0dB<br />6. Voltage : DC1.5V<br />7. Current : ｡・mA<br />8. Color : As pictures<br /><br />Package includes :  <br />1 x K-80 Hearing Aids<br />1 x User Manual<br />1 x Case<br />2 x AG3 Button Cells<br />4 x Units of earplug of different size