1. What is the difference from red laser and green laser?
Red laser gets wavelength of 635nm and 650nm, and green laser gets wavelength of 515nm, 520nm and 532nm. Different wavelength laser gets different color laser beam and light spot in operation.

When laser pointer is in formal work, it always requires certain operating environment. Generally its acceptable operating temperature is range from 10 degree to 40 degree Celsius. Some special laser pointers might be workable under operation temperature with range level of 0-40 degree Celsius, or even lower operating temperature.

In various high tech and entertainment working fields, laser pointers are always widely used in every corner of the world. Someone might use a laser pointer without any problem more than 2 years. However, laser pointer might also burn out after very short term. Besides self problems of laser pointer, it is also very important to make proper operation of this laser gadget.

Laser pointers are usually used as an eye-catching point in education, business presentation, and visual demonstrations.
1. Red laser pointer can be used in almost any indoor or low light situations, pointing out details by hand may be convenient.
2. Green laser pointer can be used for astronomy enthusiasts