Super six functions: 1.Wireless headphone 2.Wired headphone 3.FM radio receiver 4.Wireless monitoring 5.Wireless chat onling 6.LED color indicator light Transmitter: 1.Emission frequency:86MHz 2.Modulation mode:FM 3.Emission distance:up to 35 meters(with no interference) 4.Power supply:2*AAA batteries or 4.5V adaptor Rceiver(headphone): 1.Frequency range:84-108MHz 2.Reception mode:FM 3.Distortion:<2% 4.Power supply:2*AAA batties(Product color in silver,purpule,red,black,green,etc.)