What's in the box:

IR Infrared Wireless Car Headphones Stereo Headset Wired Earphone Dual Channel for In-car DVD Player (Standard)

Features:
* Suitable for Car Video & 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: -88dBm3dB
Impedance: 32O
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