This video shows how to get the correct focal length of LaserPecker LP3. We offer you two methods to adjust the focal length of LaserPecker LP3：
Method 1: Adjust the Electric Stand to make the two red dots coincide;
Method 2: Adjust the up or down button on the App to make the two laser dots overlap.
Please feel free to contact us if you have any problems.
Support Team: support@laserpecker.com