Last but not least

I set up an online store which wholesale green laser pens. And firstly, I built a group to discuss the usage of the low and high power green laser.

Someone told me that a 200mw green laser can be used as a good assistant for a wonderful meeting presentation and a 30mW Green Laser pen is a fantastic toy for cute puppy. Besides, shining under the beam50mw green laser pointer pen at a bar, you can more enjoy your dance! In addition to them, a 20mw green laser can guide you unlock in dark. That is the usages of Green Laser Pen. But I know nothing about a 20mw green laser pointer, who would like to tell me some related information about it? Thanks a lot!