I purchased these from MusicTeck (U.S. retailer for UM) back in December 2017; it's still under the one-year warranty. Never transported, used exclusively at work (clean, corporate environment). If I had to guess, these have about 600 hours on them. Reason for selling: Want to use funds for another (non-audio) purchase. Thus, no trades, please. I have the original wooden box with foam (including black box sleeve), warranty card, rubber carry case, adapters, cleaner, and unused tips. Currently, I'm using them with the Symbio W tips, which have been my favorite. Will include them and clean with alcohol wipes. Shipping via USPS Priority is on me.