1. Model of operation: Open the video greeting card automatically play, close it automatically shut down. You can also add some function buttons according to the customer's requirements, such as play, stop, pause, volume, and so on.
2. Charging mode: The USB cable connects to the computer for charging.
3. Video replacement: Connect the computer through USB cable, find the mobile disk, you can change, delete, and upload any video to the video card. It is equivalent to an ordinary USB disk.