I have made purchase of a bulk of 635nm red dot laser alignment from Berlinlasers. I am told that it can take 5-8 days for delivery of package, but actually I get the package 10 days after taking the order. Fortunately, the red dot laser alignment is as fine as its description. The 10mW red laser dots are all very bright and visible in room working environment, and always keep stable and reliable in long term continuous dot projection work. They keeps perfect performance after 8 hours continuous dot emission. I am a bit unhappy with the long term delivery of the package.