Features: 1. Wireless infrared stereo headset for car, easy to operate, which is a wonderful accessory. 2. Ergonomic design, which can bring you comfortable wearing experience. 3. Auto power mute and auto off headphone function, which is convenient for using. 4. Foldable and lightweight design, convenient to carry and store. 5. Stereo audio model, which has clear sound quality without distortionification: Condition: 100% Brand New Two Channel: Channel A: 2.8 MHz for the right channel; 2.3 MHz for the left channel Channel B:3.8 MHz for the right channel; 3.2 MHz for the left channel Speaker: 30mm for Mylar Cone Impedance: 32Ω ± 15% Effective Range (maximum): About 10 Meters Power Source: 1 X AAA Battery (not Included) Signal Noise Ratio: ≥70dB Channel Separation: ≥40dB Frequency Response: 30-20,000Hz Audio Model: Stereo Automatically turn on when the wear and shut down when take it out of functionPackage List: 1 Pair of Infrared EarphoneNote: 1o cable and batteries is not included. 2. The infrared headphones is mainly used for the car DVD, if you need it for the TV, please buy transmitter to pair with the headset, otherwise the headphones will not work at all.