In the video, a person is holding a white device with a red wire and a black wire attached to it. The person is using the device to test a speaker. The speaker is attached to a car door and is black in color. The person is wearing a black shirt and is holding the device with their right hand. The background is blurred, but it appears to be a garage or workshop setting. The person is using the device to test the speaker by touching the red wire to the positive terminal and the black wire to the negative terminal. The device has a small screen that lights up when the speaker is functioning properly.