Features: 
* Suitable for Car & Audio Devices, such as headrest DVD players. 
* Ultralight design for long time comfortable wearing, perfect enjoyment. 
* IR dual-channel wireless headphone function. Operating distance is up to 10 meters. 
* Automatically mute and auto power off if no signal is received about 5 minutes. 
* Built-in 40mm mylar speaker for audiophile grade sound quality. 
* Works with smart phones, tablet PC, MP3 devices via a 3.5mm audio cable (not included). 
 
 Note: When use the device as wired headphone, volume knob on the headphone cannot be used, and you can only adjust volume on your audio device. 
 
 Specifications: 
Channel: Dual 
Mode: Stereo 
Carrier Frequency: 
a) A channel: 2.8MHz for right channel; 2.3MHz for left channel 
b) B channel: 3.8MHz for right channel; 3.2MHz for left channel 
Operating Distance: up to 12 meters 
Frequency Response: 60Hz-6000Hz 
Sensitivity: -88dBm±3dB 
Impedance: 32Ω 
S/N Ratio: ≥50dB 
Channel separation: >35dB 
Distortion: <1% 
Power Supply: 2 * AAA Batteries (Not Included) 
Main Item Size: 17.6 * 15.3 * 6.4cm / 6.92 * 6.02 * 2.51in 
Main Item Weight: 123g / 4.34oz 
Package Size: 19.9 * 15.4 * 4.2cm / 7.83 * 6.06 * 1.65in 
Package Weight: 180g / 6.36oz 
 
 Package List: 
1 * IR Infrared Wireless Stereo Car Headphone 
1 * English User Manual
Docooler IR Infrared Wireless Car Headphones Stereo Headset Wired Earphone Dual Channel for In-car DVD Player