Meaning if I hold down the left click, it will disengage and re-trigger. Cup pressure is perfect for large heads, but also great for all other head sizes. I have had a pair of Sennheiser CX 300 II Precision Earbuds prior to purchasing this particular product, and in almost 2 years I never had a single problem with those, despite sending them through the laundry washer/dryer more than once on accident. Seems well made and I really like the flat surface on the AC outlet strip. ?? Added a photo with the pairing instructions in case anyone needs. It seems to have a headphone jack to plug in an auxilary cord but I havent tried this. Canoe seMuy lindos y cómodos, calzan perfecto, los recomiendo! My ear fit in the cups now, there is no sliding sensation with the headphones anymore. At my job, getting wet feet is almost inevitable, and today was no exception. I have always struggled with these types of earbuds.