1. To be very simple (click on the microphone to order a song)
2. Be very convenient (you can click on the screen and adjust the volume)
3. To be very fast (enable the hand cover function, you can directly order the song without touching the screen and covering the lens with your hand)
4. To be free
5. There must be user experience (moon dark mode, just for the ultimate power saving)

*When hand cover function is activated, you can still cover the camera and order songs after the video is switched to full screen!