... life: Approx 48 hours Power Supply:DC2.2V-3.3V Infrared Wireless Stereo Headset (CL-2009IR)1,Power Supply: ... DC2.2V~3.3V2,Working Current:30mA±5mA3,Receiving ... ,R/2.8MHzB channcl:L/2.3MHz,R/3.8MHz4,Receiving Distance:≥6m5,Frequency Response:20Hz~20KHz6, ... VCD, DVD, Mp4, computer and other built-in infrared audio modules are compatible with