These are dual channel headsets which means you can use multiple of these at the same time while having each headset listening to a different source. If you have dual DVD headrests, or video games built into one of your monitors, then this is the best solution for you.These dual channel headsets are going to bring that same sound quality RE Audio is known for. They manufactured these headsets with a great sounding 40 MM mular dome speaker which has great sound.Thoughtful features like a light-weight design, comfortable leatherette ear pads, and a foldable design for easy portability are just the beginning. The best part is how good they sound.Features:Rockville RFH-3 Dual Channel IR HeadphonesFoldable design for Travel convenience and easy storageComfort control leatherette ear surroundDual channel function capable (A/B)Improved acoustic performance40mm Mylar dome speaker built inExtended bass responseImpedance: 32 Ohms ±10%Effective distance: 10 meters (max.)Light weight design for wearing comfortAuto muting on headphoneAuto power off when no signalSpecifications:A Frequency range 17-23,000 HzA Channel, IR_OUT_L:2.8 MHzA Channel, IR_OUT_R:2.3MHzB Channel, IR_OUT_L:3.8 MHzB Channel, IR_OUT_R:3.8 MHzB Channel, IR_OUT_R:3.2MHzSensitivity 96 dBModulation high frequencyPower supply 2X1.5VBattery R03 (AAA) 48h (Batteries not included)Weight 160 gr. (excl. batteries)