I have own the Dunu tridents for about 4-5 months, and about a week about, the left ear suddenly stopped working. I left them on my desk for the weekend, no spills, or anything touching them. Now i did dunk them in water about 2 months ago by accident (tl;dr hung on my neck and fell into my cup or water), but they worked fine after that until now. I tried drying them by putting them near a heater but that did nothing. I bought them from ebay, so maybe that plays a factor. Overall, i would recommend them if they lasted a bit longer, but they were pretty cheap, so, i don't know.