Infrared wireless stereo headphone

(2 CH) for cars headrest dvd/roof mount dvd player

Features: 
1) Infrared wireless stereo headphone (2 CH) for cars 
2) Ergonomic design for comfortable wearing
3) Auto mute and auto power off function on headphone
4) Folding Design

Specifications
1) Dual channel
2) 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
3) Speaker: 40mm mylar
4) Cone impedance: 32Ω±15%
5) Effective range (maximum): about 10 meters
6) Power source: 2 x AAA batteries 
7) Battery life: about 48 hours 
8) S/N ratio: ≥70dB 
9) Channel separation: ≥40dB 
10) Frequency response: 30 ~ 20,000Hz 
11) Audio model: stereo

Package:

 Generic package box