Sunglasses Tester (UV-400)

The function is explained:
1. When check the lens and resist UV printing opacity rate index, put measuring the lens in the ultraviolet exit, digital display number value for resist UV printing opacity rate index value, resist uv index value up to 400
Mms best at this moment.

2. Measure and resist radiation at the lens protruding piece geting wicked rubber will send the cry of chirping out, the lens that will not sound proves that does not resist radiation.

3. Put the lens under the more light of ultraviolet ray to open while measuring the stelthy anti-counterfeit trade mark, atealthy anti-counterfeit trade mark switch, rotate hte lens.

4. At measuring and change color lens, put in then ultraviolet exit, after the one second, lens will change color, time long to change color dark.