Adjustable leatherette padded headband and construction for comfort.Design for rear car entertainment (over-head video and headrest dvd), support Infrared wireless connection via IR transmitter ( battery needed,not included),dual channel and intuitive volume control for the setup.UNIVERSAL COMPATIBILITY - Compatible with for ,for ,for ,for ,for Escalade,for Uplander,for ,for Acadia,for Enclave,for Montana SV6,for Terraza,for Relay,for ,for ,for ,for and more car DVD players / aftermarket Headrest video player (DO NOT SUPPORT DIGITAL IR system and wireless playback for portable DVD players).You can use it to connect the car stereo or CD DVD players, for ,smartphones.Single channelCarrier frequency:A channel: 2.8MHz for right channel; 2.3MHz for left channelB channel: 3.8MHz for right channel; 3.2MHz for left channelSpeaker: 30mm mylarCone impedance: 32 ohm +/- 15%Effective range (maximum): about 10 metersPower source: 1 x AAA battery is enoughAutomatically turn on when wear and turn off when take it off functionS ratio: greater or equal to 70dBChannel separation: greater or equal to 40dBFrequency response: 30 ~ 20,000HzAudio model: stereoColour: blackMaterial: ABSPackage Contents:2 * IR wireless headphonesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.