Capacitive touch screen can only be controlled by fingers. Its working principle is that the human body induces current to work. When the finger touches the screen, the finger will draw a small current from the contact point and flow out from the electrodes at the four corners of the touch screen. The controller can get the position of the touch point by accurately calculating the ratio of the four angles of the current. From its working principle, we can see that no foreign tool can replace finger operation.

What live broadcast equipment should be prepared for online education? Live broadcast must have a mobile phone/computer /iPad/ camera, live broadcast must have two microphones, and live broadcast must have three fill lights.