Abstract: The present invention relates to an XR (Extended Reality) device that communicates with an external camera. The device comprises one or more processors and memory storing programs configured to execute specific instructions. These instructions include accessing an application server, executing an application, receiving reference model data, and displaying the user's current posture alongside the reference model's corresponding posture. Additionally, the device can display enlarged portions of the user's and reference model's postures either side by side or in an overlapping manner. The device also includes functionality for controlling the external camera's position, angle, zoom, or height. Furthermore, the device facilitates communication with the user through an AI assistant, which manages the application progress based on user interactions. The device can switch its point of view between the external camera's perspective and its own, either according to user preference or automatically.

Abstract: A printed circuit board (PCB) with electrostatic discharge protection includes at least a lead wire having a first edge with an exposed copper, and a ground wire having a second edge with another exposed copper, in which the first edge faces the second edge with a predetermined spacing. By providing the pair of the first and the second edges, electrostatic discharge of the PCB can be arbitrarily carried out between the lead wire and the ground wire.