IR Wireless Stereo Headphone

Features: 1) IR wireless headphone 2) Light weight 3) Automatic muting design on receiving headphone 4) FM system carrier frequency: a) 2.8MHz right channel b) 2.3MHz left channel 5) Speaker: 40mm mylar 6) Cone impedance: 32 ohms ±15% 7) Effective range (max.): about 10 meters 8) Power source: batteries UM4 x 2 (optional) 9) Battery life: about 48 hours