1, Lying on the side for a long time does not press on the ears, no loss of sound quality, long-lasting battery life.
2, The upgraded version is really small, it doesn't hurt your ears after wearing it for a long time, and it is designed for sleep.
3, three colors to choose from, good appearance, fashionable and simple.
4, can take high-speed trains, can take planes, suitable for many scenarios.
