LA-403 Universal Behind-the-Head Stereo Headphones Male 3.5mm TRSMerging comfort and convenience with exceptional audio performance, the LA 403 Universal Behind the Head Stereo Headphones from Listen Technologies are designed for listeners who wear hardhats (or just want to avoid headphone hair). Compatible with the integrated neck loop lanyard, the LA 403 can also be used with the included 3. 5mm extension cable to conceal the receiver in a pocket during use. The dual ear design helps to block external noises and