Welcome to the Newangie picosecond laser tutorial. Today we will show you how to quickly change the laser handle and precisely adjust the handle parameters! Replacing the handle is very easy, simply turn the connector counterclockwise to release it. Then, align the new handle with the connector and turn it clockwise until it is fully seated. Next, let's adjust the handle parameters. Turn the dial from 8 to 7 and the screen will automatically update to show the new parameters. You can adjust the handle parameters as needed. When you turn the dial to 6, the parameters on the screen will change to 6 accordingly. These are the simple steps to change the handle and adjust the parameters of the Newangie picosecond laser machine.