Features:
Compatible with any audio devices with IR transmitter built in.
IR double-channel wireless headphone function. 
Receive stereo crystal clear sound from audio devices wirelessly, without interference from other radio transmission sources.
Ergonomic design for comfortable wearing.
Auto power off function on headphone.
Foldable design for easy carrying around. 

Note:
Take out the batteries if you won't use it for a long time.
Recommend to buy in pairs for conveniently using.

Specifications:
Color: Black
Transmission medium: Infrared
Transmission mode: Stereo
Receiving frequency:
A channel: L/2.3MHz, R/2.8MHz
B channel: L/3.2MHz, R/3.8MHz
Frequency response: 20Hz-20KHz
SNR: ≥ 60db
Power supply: 2 * AAA battery (not included)
Dimension: 12.8 * 12.5 * 6.8cm / 5.0 * 4.9 * 2.7in
Item weight: 163g / 5.7oz 
Package size: 12.5 * 7 * 13cm / 4.9 * 2.8 * 5.1in
Package weight: 210g / 7.4oz

Package List:  K1144
1 * IR Stereo Double-channel Wireless Headphone