JYSiptkird Infrared Wireless headphones Design for rear seat car entertainment (over-head video and headrest dvd). Just turn on the headphones and they auto connect to your car's rear entertainment systems. Dual Channel Flexibly for real seat headrest DVDs working simultaneously without interference with each other. Wireless and Wired Use as you like 2x AAA batteries to work wirelessly; 3.5mm cable for connecting use without battery. Soft Ear Pads and Extendable Headband Professionally designed for rear-seat entertainment in the car.Comfortable fit can ensure all day listening. Auto Mute Automatically shut off when not received signals within 10 minutes. Warmly Notes: *Please double check IR sensor frequencies of your car DVD player first(often check it in the manual) *Please use 2×AAA batteries and check the volume on your DVD and headphones,make sure they turn to a suitable level *Please try both channels on the headphone (the middle channel switch button of the headphone) as your vehicle may be transmitting on either channel A or B. Using the wrong channel will cause interference noise. Packing List 2 x IR foldable headphones 2 x 3.5mm Aux cables 2x Storage Bags 2 x Instruction Manual