In the video, a person is using a red multimeter to test the voltage of several blue batteries. The batteries are cylindrical in shape and have the brand name "UltraFire" printed on them. The person is holding one of the batteries in their hand while the multimeter is attached to the positive and negative terminals of the battery. The multimeter's screen displays the voltage reading, which changes as the person tests each battery. The background is a wooden surface, and the person's hand is visible as they manipulate the batteries and the multimeter.