wuwei 30cmor 12"

wuwei The Chinese wear these to protect others around them, and they do so out of a sense of social responsibility! The idea wearing one of these masks is to prevent you coughing and sneezing out the virus all over the place. If you're infected but asymptomatic (showing no symptoms), you may feel perfectly well but are still contagious and can infect others. By stopping virus transmission at the source, your mouth, you don't contaminate the air with virus loaded respiratory droplets. Many people in western countries are too selfish and irresponsible to think about others, so they usually don't wear masks. Hope this makes sense. If you want to protect yourself from virus transmission by inhalation, get a tight-fitting N95 or N99 rated mask. Surgical masks in general are able to block out 80% of particles.

wuwei I compared it to my 10x25 binoculars, it's not as powerful, an object that fills half of the field of view of the 10x binoculars fills 1/3 of this telescope's field of view, it's more like a x6 power only. The objective lens measures 40mm, so it's actually a 6x40 in real world specifications. That said, it's nice and clear, work well!

wuwei Draws around 2A on full power @ 5V. Power P = V × I = 5 x 2 = 10W That's an approximate calculation!