(http://www.kitlaser.com/powerful-burning-laser-pointer-pen.html)
This laser pen has high power with four blue laser parameters. You can adjust the beam to be constant, which keeps the light up for the battery, or you can also choose from the temporary settings. The other three parameters include strobe, bypass, flick the upper frame and last for only one second. Each set of light gives the different feel of the tool, so you can adjust the performance of your laser pen on the basis of the task to be done.Teachers and professors have used the laser pointer during the visual presentation of the highlights and the key areas of the screen. In recent years, with the reduction of manufacturing costs, consumers now have a variety of functional options, including color and style. The visible range of the laser pointer can vary greatly depending on the wavelength, output power and environmental factors such as lighting base and air quality.There are a lot of things that can be done, but it's safe to have fun with the laser pointer burning. As the old saying goes, "safety first! Because no one wants to be hurt, but do not let it stop him from playing with the laser pointer.
(http://www.kitlaser.com/green-50-blue-80-double-beam-laser-pointer.html)