This is measuring device. It has water level and laser part. Both are way off. Right angle between lasers is off by 8mm at 1m from device; and water level shows very different readings one way, and turned 180 degrees (if on level surface, it should show bubble in the middle one way or the other, but shows way to one side). Laser lines are of very variable (not uniform like it should be) width. It is not doing what it is purposed for. I hope I can repair it. (picture taken under poor light, to see laser at all)