•  Max. saturated sound pressure:   ≤123+5db

•  Max.voice gain:                  33±5db

•  Equivalent input noise level:    ≤32db

•  Total harmonic wave distortion:  ≤10%

•  Frequency response range:        100-3700HZ

•  Battery : rechargeable

•  Continuous working time:≤15H       

•  Working current:≤10mA

•  Working voltage:1.2V

•  Attachment:1*host,6*earplug,1*adapter（Europe or US）,1*data line,1*charging base,1*cleaning brush,1*English manual

PRODUCT SIZE:44*16*10mm