Sucks and Bigly- Poor Ergonomics- Awful Left/Right Buttons (only active at far end of switch necessitating a very forward/awkward grip)- Sketchy Controls inc Flakey Wheel/Button (ie cheap construction)- Lesson LearnedIve used computers since the early 80s and this is hands down the worst mouse Ive ever encountered. Everyone that sees it loves it. Can?t speak to duration or anything beyond my short test drive. Jedoch schneiden hierbei einige Konkurrenzgeräte zum Teil ebenfalls nicht mit Bravour ab. It has been in production for several years and has been very well received by professional audiophile magazine reviews and reviewers who own the headphones. I unplugged and replugged it and finally got it to work momentarily until it cut off yet again. I set up the blue tooth connection. My sister, daughter and even my son steal them and wear them on a daily basis. so yes it works well. It stood there hard and tight.