1. USB2.0 interface, the speed of transmitting a high-definition movie is also considerable. 2. A-level Flash chip, data storage is more stable and faster. 3. Strong compatibility, support USB TV and car playback, connect to the player box USB interface or directly connect to the TV USB interface to use. 4. The ring shape is combined with the storage technology. The outer shell is made of all metal and has a texture. 5. The ring shape can be rotated 360 degrees, easy to carry around.