◆Universal IR signal for In car audio from the factory or aftermarket video and audio devices Compatible with headrest DVD players and other car video devices. It can also use outside the car | ◆Dual Channel IR (Channel A or B): 2 and more kids could enjoy respective different audio and video entertainment | ◆The most comfortable car wireless headphone for hours of comfortable enjoyment, durable and lightweight | ◆Multi-use: Can use as wireless or as wired with the Included 1.4m audio cable for 3.5mm port devices. Works with smart phones, tablets, MP3 players, etc | ◆100% Satisfied Customer Service: This IR wireless headphone support 12 months warranty. Speedy refund/replacement sent for quality problem. If you have any question, CarThree customer service team will be ready at 7x24 hours