Dr. Somali Nguyen introduces the essential controls and probes used in point-of-care ultrasound. He begins with locating the power button—often hidden depending on the machine model—and then explains key functions: the gain dial for adjusting image brightness, depth control for viewing superficial or deep structures, and calipers for measuring anatomical distances. He highlights the importance of capturing quality images and videos for documentation and collaboration. Additional features include color mode for assessing blood flow direction, motion mode (M-mode) for tracking movement over time, and three primary probes: the linear probe for superficial imaging, the phased array probe for cardiac views, and the curvilinear probe for abdominal assessments. The lecture emphasizes practical use and clinical relevance of each control and probe.