i.Voltage：2.0~3.0VDC, 2*AAA batteries

ii.Electric current： 40mA

iii.Wireless Headphone Receiving Frequency：109Mhz/110Mhz

iv.Radio frequency：87.5MHZ~108.0MHZ

v.Receiving Sensitivity：better than 8dBuVemf

vi.Receiving frequency response：60~10000HZ

vii.Audio Output Range：1000mVp-p

viii.Distortion：<1%< p="">

ix.S/N rate：>60dB