the definition of indicators

The use of data obtained from 5 to calculate the series resistance, power efficiency and external differential quantum efficiency (approximately equal to one wavelength of 670nm). The 2.4G technology of laser pointer  is advanced enough. The 2.4G technology of laser pointer  is at the world’s level. Laser product hazard level classification is to describe the laser system to the extent of human damage to the definition of indicators. Classification from Class I laser (no damage) to Class IV lasers such as the 2000-watt carbon dioxide laser (you can cut thick steel plate). Manufacturers must be Class II, Class III and Class IV laser products are labeled with the risk level classification of the words with laser warning label. The beams are likely to view any blocked, and exposed to the laser in the laser system is interlocked. (Large laser printers such as the DEC LPS-40 is 10 mW (IIIb type) helium-neon laser-driven, although the actual laser is Class IIIb, but the printer is interlocked so as to avoid any exposure to the laser beam exposure, Therefore, the device does not produce any biological hazards, which also applies to CD players and small laser printers, they are first-class device). This kind of  laser pointer  has the directivity.
Output power of 1 mW. Will not burn the skin, does not cause a fire. As the eye reflex can prevent some eye damage, so these are not considered dangerous laser optical devices. (For example, when the eye encounters a bright light, it will automatically blink, or turn the head to avoid the strong light. This is called reflex action or reflex time in this time of such laser products will not cause eye injury. However, a person will not be willing to look a long time staring at it). In this type of laser equipment should be placed on a yellow warning label. Output power of 1 mW to 5 mW. Will not burn the skin. Under certain conditions, these lasers can cause blindness and other eye damage. These lasers should include: laser light, indicating that the laser is working; should use the power key switch to prevent unauthorized use; hazard label should be affixed with a label and output xx. Output power of 5 mW to 500 mW. When the power is relatively high, these laser products can burn skin. The using of  laser pointer  will be limited by the directivity.