• Max. saturated sound pressure:   ≤128+5db

• Max.voice gain:                  32±5db

• Equivalent input noise level:    ≤43db

• Total harmonic wave distortion:  ≤10%

• Frequency response range:        200-6000HZ

• Output power:3mW

• Battery voltage:3.7V

• Working current:≤10mA 

• Directivity：omni-directional

• Attachment:1*host,3*earplug,1*adapter（Europe or US）,1*data line,,1*English manual                  

PRODUCT SIZE:61*19.5*35mm