Multi-function wireless headphone(VHF/RF) Total Price VHF/RF wireless headphone The headphone can be used as a portable FM radio with auto-tuning function. The headphone can be used as a Hi-Fi stereo wired headphone. Wireless monitor function Talk on internet with wireless headphone Talk on internet with wired stereo headphone carrier frequency 85.5MHz (VHF/RF) modulation Frequency modulation ( FM ) audio model mono operation distance >30meter receive frequency 85~108MHz S/N ratio >50dB Distortion <2%THD frequency response 20 ~ 20,000Hz power supply transmitter: DC 3V ( 1.5V AAA battery ), receiver: DC 3V ( 1.5V AAA battery )