Design completed in 2 days. There are many similarities in appearance on the market, comparing two points of competition: 1. Mobile phones and earphones are both discs, which unify the design language. The bottom heat dissipation hole is also considered, which is the connection of two runway circles and one large circle. (Many people do the bottom cooling holes casually. In fact, we should keep improving the appearance and try our best to make people unable to find the places that need to be modified.) 2. I hid the USB interface powered by the Apple watch at the bottom (the competitors are all on the side edge-the data collected when I was doing it), so that the original charging line of the watch can be hidden and stored in the body, making the desktop cleaner. The thread longer than 1 meter can be extended (in fact, few people use 3 meter thread in Apple watches, but since this exists, let's solve this problem.)