In the video, we see a close-up of a voltmeter, which is a device used to measure the potential difference between two points in an electrical circuit. The voltmeter has a yellow frame and a white dial with black and red markings. The needle on the dial moves up and down, indicating the voltage level. The voltmeter is connected to a circuit, and we can see the needle moving up and down as the voltage changes. The voltmeter is labeled with the word \"POWER\" at the bottom, and there is a warning symbol indicating that it is an AC voltmeter. The voltmeter is set to measure voltage in the range of 50 to 250 volts. The needle moves smoothly and accurately, indicating that the voltmeter is functioning properly.