IR wirless headphone dual channel, headphones studio IR wireless headphone, double channel headphone, Volume Control IR stereo wireless headphone studio dual channel(VCAN0215) Specification:1. Channel:Dual2. Carrier frequency: ... carton=0.08CBM20'Container=300cartons=6000pcsNet weight:16kgsGross weight:18kgs IR stereo wireless headphone studio dual channel(VCAN0215)