BOS HD820

wireless stereo headphone whit 40mm power & signal indicator maylar speakers.
UHF/RF systeem working on FM modulation.
Three colour LED indicator whitch displays the channel.
Frequenties; 863.100Mhz, 863.800Mhz, 864.950Mhz.
Independent volume control.
Frequency response 30 - 20000Hz.
Power supplied by two 1.5V AAA sized batteries will provide a 20 hour operating time.
Signal to noise ratio >75dB.
Channel seperation > 35dB.
THD <1%