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SYNC by 50™ Wireless Headphones. Lossless audio for crystal clear wireless sound (up to 50' away) and the ability to sync up to 4 pairs of headphones to a single audio source. Allow you to roam wherever the music takes you — whether it's across town or around the world. Perfect for commuting, jogging or travel, professionally tuned to provide the clearest, cleanest, most dynamic range of sound and made with only the highest-quality materials for the ultimate in style and comfort.