In-Car IR Wireless Stereo Headphone (IR-8365 IR-8365D)

Features: 1) IR-8365 infrared wireless stereo headphone (1ch) for cars 2) IR-8365D infrared wireless stereo headphone (2ch) for cars 3) Ultra Light weight design for comfortable wearing 4) Auto mute and auto power off function on headphone Specifications (IR8365) 1) Single channel 2) Carrier frequency: a) Right channel: 2.8MHz b) Left channel: 2.3MHz 3) Speaker: 30mm mylar 4) Cone impedance: 32Ω?5% 5) Effective range (maximum): about 10 meters 6) Audio mode: stereo 7) S/N ratio: 60dB 8) Channel separation: 40dB 9) Frequency response: 30 ~ 20,000Hz 10) Power supply: 2 AAA batteries Specifications (IR8365D): 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: 30mm mylar 4) Cone impedance: 32Ω?5% 5) Effective range (maximum): about 10 meters 6) Power source: 2 AAA batteries 7) Battery life: about 48 hours