Stereo dual channel IR wireless headphone,IR headphone,wireless headset I. Use instrutionFitted with two 3A/LRO3/UM4(NO.7)battery in the WIR-2010C and be used with the transmitter ,please pay attention the battery polarity.Turn on,adjust the volume,you can listen now.Adjust the L/R channel for the best sound."off" means turn on/off," A" means A channel,:"B"means B channel.II.Features: 1. ...