Systems and methods for testing a peripheral in accordance with a high-speed serial interface protocol are provided. The monitoring camera can include an imaging element and an image forming lens comprising multiple lenses each having a different focal length. Thus, the stroller can be extended and folded easily and conveniently, thereby facilitating the user utilizing and folding the stroller. The portal-page service searches for the customer service and generates a user interface for the customer service based on the customer service. When the user presses the switch, the processor begins the algorithm. The polishing apparatus further includes a polishing fluid supply system for supplying a polishing fluid to a surface of a substrate through the openings.